25536408513 has 32 divisors (see below), whose sum is σ = 44295800832. Its totient is φ = 12688896000.

The previous prime is 25536408479. The next prime is 25536408523. The reversal of 25536408513 is 31580463552.

It is not a de Polignac number, because 25536408513 - 2⁸ = 25536408257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25536408523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2397888 + ... + 2408513.

It is an arithmetic number, because the mean of its divisors is an integer number (1384243776).

Almost surely, 2^25536408513 is an apocalyptic number.

25536408513 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25536408513 is a deficient number, since it is larger than the sum of its proper divisors (18759392319).

25536408513 is a wasteful number, since it uses less digits than its factorization.

25536408513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4806445.

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 25536408513 in words is "twenty-five billion, five hundred thirty-six million, four hundred eight thousand, five hundred thirteen".