25134615979 has 16 divisors (see below), whose sum is σ = 28289188224. Its totient is φ = 22318212840.

The previous prime is 25134615973. The next prime is 25134615983. The reversal of 25134615979 is 97951643152.

It is a de Polignac number, because none of the positive numbers 2^k-25134615979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25134615973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162349 + ... + 276814.

It is an arithmetic number, because the mean of its divisors is an integer number (1768074264).

Almost surely, 2^25134615979 is an apocalyptic number.

25134615979 is a deficient number, since it is larger than the sum of its proper divisors (3154572245).

25134615979 is an equidigital number, since it uses as much as digits as its factorization.

25134615979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439239 (or 439217 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 52.

The spelling of 25134615979 in words is "twenty-five billion, one hundred thirty-four million, six hundred fifteen thousand, nine hundred seventy-nine".