25644545016 has 32 divisors (see below), whose sum is σ = 67882620240. Its totient is φ = 8045347328.

The previous prime is 25644544993. The next prime is 25644545021. The reversal of 25644545016 is 61054544652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31426731 + ... + 31427546.

Almost surely, 2^25644545016 is an apocalyptic number.

It is an amenable number.

25644545016 is an abundant number, since it is smaller than the sum of its proper divisors (42238075224).

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

25644545016 is a wasteful number, since it uses less digits than its factorization.

25644545016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62854303 (or 62854299 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 42.

The spelling of 25644545016 in words is "twenty-five billion, six hundred forty-four million, five hundred forty-five thousand, sixteen".