25708510872 has 72 divisors (see below), whose sum is σ = 76532421420. Its totient is φ = 7790455200.

The previous prime is 25708510859. The next prime is 25708510873. The reversal of 25708510872 is 27801580752.

25708510872 is a `hidden beast` number, since 2 + 57 + 0 + 8 + 510 + 87 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25708510873) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1466754 + ... + 1484177.

Almost surely, 2^25708510872 is an apocalyptic number.

25708510872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25708510872 is an abundant number, since it is smaller than the sum of its proper divisors (50823910548).

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

25708510872 is a wasteful number, since it uses less digits than its factorization.

25708510872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2950965 (or 2950947 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 45.

The spelling of 25708510872 in words is "twenty-five billion, seven hundred eight million, five hundred ten thousand, eight hundred seventy-two".