25022964864 has 64 divisors (see below), whose sum is σ = 66617742240. Its totient is φ = 8322103296.

The previous prime is 25022964859. The next prime is 25022964899. The reversal of 25022964864 is 46846922052.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×25022964864² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96564 + ... + 243660.

Almost surely, 2^25022964864 is an apocalyptic number.

25022964864 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 25022964864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33308871120).

25022964864 is an abundant number, since it is smaller than the sum of its proper divisors (41594777376).

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

25022964864 is a wasteful number, since it uses less digits than its factorization.

25022964864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147557 (or 147545 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 48.

The spelling of 25022964864 in words is "twenty-five billion, twenty-two million, nine hundred sixty-four thousand, eight hundred sixty-four".