25497927990 has 48 divisors (see below), whose sum is σ = 69783807600. Its totient is φ = 6441581376.

The previous prime is 25497927977. The next prime is 25497928007. The reversal of 25497927990 is 9972979452.

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, 7453825 + ... + 7457244.

It is an arithmetic number, because the mean of its divisors is an integer number (1453829325).

Almost surely, 2^25497927990 is an apocalyptic number.

25497927990 is an abundant number, since it is smaller than the sum of its proper divisors (44285879610).

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

25497927990 is a wasteful number, since it uses less digits than its factorization.

25497927990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14911101 (or 14911098 counting only the distinct ones).

The product of its (nonzero) digits is 25719120, while the sum is 63.

The spelling of 25497927990 in words is "twenty-five billion, four hundred ninety-seven million, nine hundred twenty-seven thousand, nine hundred ninety".