25797449400 has 96 divisors (see below), whose sum is σ = 79997045040. Its totient is φ = 6877173760.

The previous prime is 25797449387. The next prime is 25797449423. The reversal of 25797449400 is 494479752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3174142 + ... + 3182258.

Almost surely, 2^25797449400 is an apocalyptic number.

25797449400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25797449400 is an abundant number, since it is smaller than the sum of its proper divisors (54199595640).

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

25797449400 is a wasteful number, since it uses less digits than its factorization.

25797449400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13433 (or 13424 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 25797449400 in words is "twenty-five billion, seven hundred ninety-seven million, four hundred forty-nine thousand, four hundred".