25488540864 has 70 divisors (see below), whose sum is σ = 75556035324. Its totient is φ = 8496178560.

The previous prime is 25488540773. The next prime is 25488540893. The reversal of 25488540864 is 46804588452.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 25488540864.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2453202 + ... + 2463569.

Almost surely, 2^25488540864 is an apocalyptic number.

25488540864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25488540864 is an abundant number, since it is smaller than the sum of its proper divisors (50067494460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25488540864 is an equidigital number, since it uses as much as digits as its factorization.

25488540864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4916795 (or 4916776 counting only the distinct ones).

The product of its (nonzero) digits is 9830400, while the sum is 54.

The spelling of 25488540864 in words is "twenty-five billion, four hundred eighty-eight million, five hundred forty thousand, eight hundred sixty-four".