25676972544 has 80 divisors (see below), whose sum is σ = 68927775840. Its totient is φ = 8493588480.

The previous prime is 25676972537. The next prime is 25676972549. The reversal of 25676972544 is 44527967652.

It is not an unprimeable number, because it can be changed into a prime (25676972549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137412 + ... + 265020.

It is an arithmetic number, because the mean of its divisors is an integer number (861597198).

Almost surely, 2^25676972544 is an apocalyptic number.

25676972544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25676972544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34463887920).

25676972544 is an abundant number, since it is smaller than the sum of its proper divisors (43250803296).

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

25676972544 is a wasteful number, since it uses less digits than its factorization.

25676972544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127761 (or 127745 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 57.

The spelling of 25676972544 in words is "twenty-five billion, six hundred seventy-six million, nine hundred seventy-two thousand, five hundred forty-four".