25890025590 has 96 divisors (see below), whose sum is σ = 79082299296. Its totient is φ = 5793569280.

The previous prime is 25890025561. The next prime is 25890025607. The reversal of 25890025590 is 9552009852.

25890025590 is a `hidden beast` number, since 2 + 5 + 8 + 90 + 0 + 2 + 559 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 992959 + ... + 1018698.

It is an arithmetic number, because the mean of its divisors is an integer number (823773951).

Almost surely, 2^25890025590 is an apocalyptic number.

25890025590 is an abundant number, since it is smaller than the sum of its proper divisors (53192273706).

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

25890025590 is a wasteful number, since it uses less digits than its factorization.

25890025590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011694 (or 2011691 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The spelling of 25890025590 in words is "twenty-five billion, eight hundred ninety million, twenty-five thousand, five hundred ninety".