25598961000 has 96 divisors (see below), whose sum is σ = 86524518600. Its totient is φ = 6826387200.

The previous prime is 25598960987. The next prime is 25598961001. The reversal of 25598961000 is 16989552.

25598961000 is a `hidden beast` number, since 2 + 559 + 8 + 96 + 1 + 0 + 0 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8990453124 + 16608507876 = 94818^2 + 128874^2 .

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

It is not an unprimeable number, because it can be changed into a prime (25598961001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1413165 + ... + 1431164.

Almost surely, 2^25598961000 is an apocalyptic number.

25598961000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25598961000 is an abundant number, since it is smaller than the sum of its proper divisors (60925557600).

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

25598961000 is a wasteful number, since it uses less digits than its factorization.

25598961000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2844356 (or 2844339 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 25598961000 in words is "twenty-five billion, five hundred ninety-eight million, nine hundred sixty-one thousand".