25920797685 has 32 divisors (see below), whose sum is σ = 43932575232. Its totient is φ = 13005388800.

The previous prime is 25920797681. The next prime is 25920797713. The reversal of 25920797685 is 58679702952.

It is not a de Polignac number, because 25920797685 - 2² = 25920797681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25920797681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 577887 + ... + 621123.

It is an arithmetic number, because the mean of its divisors is an integer number (1372892976).

Almost surely, 2^25920797685 is an apocalyptic number.

It is an amenable number.

25920797685 is a deficient number, since it is larger than the sum of its proper divisors (18011777547).

25920797685 is a wasteful number, since it uses less digits than its factorization.

25920797685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45613.

The product of its (nonzero) digits is 19051200, while the sum is 60.

The spelling of 25920797685 in words is "twenty-five billion, nine hundred twenty million, seven hundred ninety-seven thousand, six hundred eighty-five".