25697919792 has 40 divisors (see below), whose sum is σ = 66576554800. Its totient is φ = 8541423360.

The previous prime is 25697919769. The next prime is 25697919799. The reversal of 25697919792 is 29791979652.

It is not an unprimeable number, because it can be changed into a prime (25697919799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750259 + ... + 783762.

It is an arithmetic number, because the mean of its divisors is an integer number (1664413870).

Almost surely, 2^25697919792 is an apocalyptic number.

It is an amenable number.

25697919792 is an abundant number, since it is smaller than the sum of its proper divisors (40878635008).

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

25697919792 is a wasteful number, since it uses less digits than its factorization.

25697919792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534381 (or 1534375 counting only the distinct ones).

The product of its digits is 38578680, while the sum is 66.

The spelling of 25697919792 in words is "twenty-five billion, six hundred ninety-seven million, nine hundred nineteen thousand, seven hundred ninety-two".