25979731534 has 16 divisors (see below), whose sum is σ = 41362833600. Its totient is φ = 12195857664.

The previous prime is 25979731511. The next prime is 25979731543. The reversal of 25979731534 is 43513797952.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 920214 + ... + 948025.

It is an arithmetic number, because the mean of its divisors is an integer number (2585177100).

Almost surely, 2^25979731534 is an apocalyptic number.

25979731534 is a deficient number, since it is larger than the sum of its proper divisors (15383102066).

25979731534 is a wasteful number, since it uses less digits than its factorization.

25979731534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868667.

The product of its digits is 7144200, while the sum is 55.

The spelling of 25979731534 in words is "twenty-five billion, nine hundred seventy-nine million, seven hundred thirty-one thousand, five hundred thirty-four".