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7845213652 = 221728976253
BaseRepresentation
bin1110100111001110…
…00111010111010100
3202020202011010221121
413103213013113110
5112031333314102
63334250053324
7365261134003
oct72347072724
922222133847
107845213652
113366467151
12162b41a244
13980459773
14545cd4c3a
1530db22b37
hex1d39c75d4

7845213652 has 36 divisors (see below), whose sum is σ = 14748286140. Its totient is φ = 3650335744.

The previous prime is 7845213643. The next prime is 7845213659. The reversal of 7845213652 is 2563125487.

It can be written as a sum of positive squares in 6 ways, for example, as 3048516 + 7842165136 = 1746^2 + 88556^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7845213599 and 7845213608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7845213659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64758 + ... + 141010.

It is an arithmetic number, because the mean of its divisors is an integer number (409674615).

Almost surely, 27845213652 is an apocalyptic number.

It is an amenable number.

7845213652 is a deficient number, since it is larger than the sum of its proper divisors (6903072488).

7845213652 is a wasteful number, since it uses less digits than its factorization.

7845213652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76380 (or 76361 counting only the distinct ones).

The product of its digits is 403200, while the sum is 43.

The square root of 7845213652 is about 88573.2106903662. The cubic root of 7845213652 is about 1987.0170414243.

The spelling of 7845213652 in words is "seven billion, eight hundred forty-five million, two hundred thirteen thousand, six hundred fifty-two".

Divisors: 1 2 4 17 34 68 89 178 289 356 578 1156 1513 3026 6052 25721 51442 76253 102884 152506 305012 1296301 2592602 5185204 6786517 13573034 22037117 27146068 44074234 88148468 115370789 230741578 461483156 1961303413 3922606826 7845213652