25893497979 has 6 divisors (see below), whose sum is σ = 37401719316. Its totient is φ = 17262331980.

The previous prime is 25893497933. The next prime is 25893498011. The reversal of 25893497979 is 97979439852.

25893497979 is a `hidden beast` number, since 2 + 589 + 34 + 9 + 7 + 9 + 7 + 9 = 666.

It is not a de Polignac number, because 25893497979 - 2²⁴ = 25876720763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25893497779) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1438527657 + ... + 1438527674.

It is an arithmetic number, because the mean of its divisors is an integer number (6233619886).

Almost surely, 2^25893497979 is an apocalyptic number.

25893497979 is a deficient number, since it is larger than the sum of its proper divisors (11508221337).

25893497979 is a wasteful number, since it uses less digits than its factorization.

25893497979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2877055337 (or 2877055334 counting only the distinct ones).

The product of its digits is 308629440, while the sum is 72.

The spelling of 25893497979 in words is "twenty-five billion, eight hundred ninety-three million, four hundred ninety-seven thousand, nine hundred seventy-nine".