25897968400 has 30 divisors (see below), whose sum is σ = 62219870042. Its totient is φ = 10359187200.

The previous prime is 25897968377. The next prime is 25897968451. The reversal of 25897968400 is 486979852.

It can be written as a sum of positive squares in 3 ways, for example, as 42614784 + 25855353616 = 6528^2 + 160796^2 .

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, 32372061 + ... + 32372860.

Almost surely, 2^25897968400 is an apocalyptic number.

25897968400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25897968400 is an abundant number, since it is smaller than the sum of its proper divisors (36321901642).

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

25897968400 is a wasteful number, since it uses less digits than its factorization.

25897968400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64744939 (or 64744928 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 25897968400 in words is "twenty-five billion, eight hundred ninety-seven million, nine hundred sixty-eight thousand, four hundred".