25994769984 has 42 divisors (see below), whose sum is σ = 74509316310. Its totient is φ = 8664923136.

The previous prime is 25994769971. The next prime is 25994770001. The reversal of 25994769984 is 48996749952.

It can be written as a sum of positive squares in only one way, i.e., 24336000000 + 1658769984 = 156000^2 + 40728^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22564329 + ... + 22565480.

Almost surely, 2^25994769984 is an apocalyptic number.

25994769984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25994769984 is an abundant number, since it is smaller than the sum of its proper divisors (48514546326).

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

25994769984 is a wasteful number, since it uses less digits than its factorization.

25994769984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45129827 (or 45129814 counting only the distinct ones).

The product of its digits is 352719360, while the sum is 72.

The spelling of 25994769984 in words is "twenty-five billion, nine hundred ninety-four million, seven hundred sixty-nine thousand, nine hundred eighty-four".