25251982008 has 64 divisors (see below), whose sum is σ = 69411409920. Its totient is φ = 7591852800.

The previous prime is 25251981973. The next prime is 25251982031. The reversal of 25251982008 is 80028915252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343053 + ... + 410108.

It is an arithmetic number, because the mean of its divisors is an integer number (1084553280).

Almost surely, 2^25251982008 is an apocalyptic number.

It is an amenable number.

25251982008 is an abundant number, since it is smaller than the sum of its proper divisors (44159427912).

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

25251982008 is a wasteful number, since it uses less digits than its factorization.

25251982008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753308 (or 753304 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 42.

The spelling of 25251982008 in words is "twenty-five billion, two hundred fifty-one million, nine hundred eighty-two thousand, eight".