26257609764 has 81 divisors (see below), whose sum is σ = 67247340433. Its totient is φ = 8638783104.

The previous prime is 26257609757. The next prime is 26257609771. The reversal of 26257609764 is 46790675262.

The square root of 26257609764 is 162042.

It is a perfect power (a square), and thus also a powerful number.

26257609764 is a `hidden beast` number, since 2 + 6 + 2 + 576 + 0 + 9 + 7 + 64 = 666.

It is an interprime number because it is at equal distance from previous prime (26257609757) and next prime (26257609771).

It can be written as a sum of positive squares in only one way, i.e., 462680100 + 25794929664 = 21510^2 + 160608^2 .

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 26257609764.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 109864357 + ... + 109864595.

Almost surely, 2^26257609764 is an apocalyptic number.

26257609764 is the 162042-nd square number.

It is an amenable number.

26257609764 is an abundant number, since it is smaller than the sum of its proper divisors (40989730669).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26257609764 is a wasteful number, since it uses less digits than its factorization.

26257609764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 54.

The spelling of 26257609764 in words is "twenty-six billion, two hundred fifty-seven million, six hundred nine thousand, seven hundred sixty-four".