25221876456 has 64 divisors (see below), whose sum is σ = 72588574080. Its totient is φ = 7153643520.

The previous prime is 25221876403. The next prime is 25221876497. The reversal of 25221876456 is 65467812252.

It is a super-2 number, since 2×25221876456² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 524905 + ... + 570936.

It is an arithmetic number, because the mean of its divisors is an integer number (1134196470).

Almost surely, 2^25221876456 is an apocalyptic number.

It is an amenable number.

25221876456 is an abundant number, since it is smaller than the sum of its proper divisors (47366697624).

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

25221876456 is a wasteful number, since it uses less digits than its factorization.

25221876456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095994 (or 1095990 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 48.

The spelling of 25221876456 in words is "twenty-five billion, two hundred twenty-one million, eight hundred seventy-six thousand, four hundred fifty-six".