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68080025 = 5213209477
BaseRepresentation
bin1000000111011…
…01000110011001
311202002211020102
410003231012121
5114412030100
610431105145
71454446016
oct403550631
9152084212
1068080025
113547a592
121a9721b5
1311148950
14908270d
155e9bcd5
hex40ed199

68080025 has 12 divisors (see below), whose sum is σ = 90913452. Its totient is φ = 50274240.

The previous prime is 68080009. The next prime is 68080031. The reversal of 68080025 is 52008086.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 5480281 + 62599744 = 2341^2 + 7912^2 .

It is not a de Polignac number, because 68080025 - 24 = 68080009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68080025.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104414 + ... + 105063.

It is an arithmetic number, because the mean of its divisors is an integer number (7576121).

Almost surely, 268080025 is an apocalyptic number.

68080025 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68080025 is a deficient number, since it is larger than the sum of its proper divisors (22833427).

68080025 is a wasteful number, since it uses less digits than its factorization.

68080025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209500 (or 209495 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 68080025 is about 8251.0620528511. The cubic root of 68080025 is about 408.3255623492.

The spelling of 68080025 in words is "sixty-eight million, eighty thousand, twenty-five".

Divisors: 1 5 13 25 65 325 209477 1047385 2723201 5236925 13616005 68080025