25955117979 has 32 divisors (see below), whose sum is σ = 41698652160. Its totient is φ = 14028487200.

The previous prime is 25955117921. The next prime is 25955117983. The reversal of 25955117979 is 97971155952.

It is not a de Polignac number, because 25955117979 - 2⁸ = 25955117723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25955117179) 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, 200224 + ... + 303314.

It is an arithmetic number, because the mean of its divisors is an integer number (1303082880).

Almost surely, 2^25955117979 is an apocalyptic number.

25955117979 is a deficient number, since it is larger than the sum of its proper divisors (15743534181).

25955117979 is a wasteful number, since it uses less digits than its factorization.

25955117979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103751.

The product of its digits is 8930250, while the sum is 60.

The spelling of 25955117979 in words is "twenty-five billion, nine hundred fifty-five million, one hundred seventeen thousand, nine hundred seventy-nine".