25007502500 has 30 divisors (see below), whose sum is σ = 54686411934. Its totient is φ = 10003000000.

The previous prime is 25007502467. The next prime is 25007502587. The reversal of 25007502500 is 520570052.

It can be written as a sum of positive squares in 5 ways, for example, as 15411732736 + 9595769764 = 124144^2 + 97958^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25007502500.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4999001 + ... + 5004000.

Almost surely, 2^25007502500 is an apocalyptic number.

25007502500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25007502500 is an abundant number, since it is smaller than the sum of its proper divisors (29678909434).

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

25007502500 is a wasteful number, since it uses less digits than its factorization.

25007502500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10003025 (or 10003008 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 26.

The spelling of 25007502500 in words is "twenty-five billion, seven million, five hundred two thousand, five hundred".