25957982731 has 16 divisors (see below), whose sum is σ = 27085259520. Its totient is φ = 24856846560.

The previous prime is 25957982717. The next prime is 25957982741. The reversal of 25957982731 is 13728975952.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25957982731 - 2¹⁷ = 25957851659 is a prime.

It is a super-2 number, since 2×25957982731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25957982741) 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, 932586 + ... + 960016.

It is an arithmetic number, because the mean of its divisors is an integer number (1692828720).

Almost surely, 2^25957982731 is an apocalyptic number.

25957982731 is a deficient number, since it is larger than the sum of its proper divisors (1127276789).

25957982731 is a wasteful number, since it uses less digits than its factorization.

25957982731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27906.

The product of its digits is 9525600, while the sum is 58.

The spelling of 25957982731 in words is "twenty-five billion, nine hundred fifty-seven million, nine hundred eighty-two thousand, seven hundred thirty-one".