25957996836 has 12 divisors (see below), whose sum is σ = 60568659312. Its totient is φ = 8652665608.

The previous prime is 25957996787. The next prime is 25957996873. The reversal of 25957996836 is 63869975952.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1081583190 + ... + 1081583213.

It is an arithmetic number, because the mean of its divisors is an integer number (5047388276).

Almost surely, 2^25957996836 is an apocalyptic number.

It is an amenable number.

25957996836 is an abundant number, since it is smaller than the sum of its proper divisors (34610662476).

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

25957996836 is a wasteful number, since it uses less digits than its factorization.

25957996836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163166410 (or 2163166408 counting only the distinct ones).

The product of its digits is 220449600, while the sum is 69.

The spelling of 25957996836 in words is "twenty-five billion, nine hundred fifty-seven million, nine hundred ninety-six thousand, eight hundred thirty-six".