25261520788 has 24 divisors (see below), whose sum is σ = 50687628992. Its totient is φ = 10791097344.

The previous prime is 25261520677. The next prime is 25261520819. The reversal of 25261520788 is 88702516252.

It is a super-2 number, since 2×25261520788² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1460781 + ... + 1477972.

Almost surely, 2^25261520788 is an apocalyptic number.

25261520788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25261520788 is an abundant number, since it is smaller than the sum of its proper divisors (25426108204).

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

25261520788 is a wasteful number, since it uses less digits than its factorization.

25261520788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2939071 (or 2939069 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 46.

The spelling of 25261520788 in words is "twenty-five billion, two hundred sixty-one million, five hundred twenty thousand, seven hundred eighty-eight".