25311136497 has 16 divisors (see below), whose sum is σ = 33815040000. Its totient is φ = 16840693584.

The previous prime is 25311136427. The next prime is 25311136517. The reversal of 25311136497 is 79463111352.

It is not a de Polignac number, because 25311136497 - 2²⁴ = 25294359281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25311136427) 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, 5316204 + ... + 5320962.

It is an arithmetic number, because the mean of its divisors is an integer number (2113440000).

Almost surely, 2^25311136497 is an apocalyptic number.

It is an amenable number.

25311136497 is a deficient number, since it is larger than the sum of its proper divisors (8503903503).

25311136497 is a wasteful number, since it uses less digits than its factorization.

25311136497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7900.

The product of its digits is 136080, while the sum is 42.

The spelling of 25311136497 in words is "twenty-five billion, three hundred eleven million, one hundred thirty-six thousand, four hundred ninety-seven".