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402492455381 = 1959720538473
BaseRepresentation
bin1011101101101100110…
…10110111100111010101
31102110220101120020000002
411312312122313213111
523043301032033011
6504522534101045
741036065264532
oct5666632674725
91373811506002
10402492455381
11145772552a85
1266009aaa785
132bc54b28703
14156a320bd89
15a70a633c3b
hex5db66b79d5

402492455381 has 4 divisors (see below), whose sum is σ = 402513013452. Its totient is φ = 402471897312.

The previous prime is 402492455347. The next prime is 402492455399. The reversal of 402492455381 is 183554294204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 216178502500 + 186313952881 = 464950^2 + 431641^2 .

It is a cyclic number.

It is not a de Polignac number, because 402492455381 - 230 = 401418713557 is a prime.

It is a super-2 number, since 2×4024924553812 (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402492455581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10249640 + ... + 10288833.

It is an arithmetic number, because the mean of its divisors is an integer number (100628253363).

Almost surely, 2402492455381 is an apocalyptic number.

It is an amenable number.

402492455381 is a deficient number, since it is larger than the sum of its proper divisors (20558071).

402492455381 is a wasteful number, since it uses less digits than its factorization.

402492455381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20558070.

The product of its (nonzero) digits is 1382400, while the sum is 47.

The spelling of 402492455381 in words is "four hundred two billion, four hundred ninety-two million, four hundred fifty-five thousand, three hundred eighty-one".

Divisors: 1 19597 20538473 402492455381