25261604508 has 96 divisors (see below), whose sum is σ = 73197322240. Its totient is φ = 6617142720.

The previous prime is 25261604497. The next prime is 25261604549. The reversal of 25261604508 is 80540616252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205816 + ... + 304767.

Almost surely, 2^25261604508 is an apocalyptic number.

25261604508 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25261604508 is an abundant number, since it is smaller than the sum of its proper divisors (47935717732).

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

25261604508 is a wasteful number, since it uses less digits than its factorization.

25261604508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510647 (or 510645 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

The spelling of 25261604508 in words is "twenty-five billion, two hundred sixty-one million, six hundred four thousand, five hundred eight".