25001251250 has 20 divisors (see below), whose sum is σ = 46862347686. Its totient is φ = 10000500000.

The previous prime is 25001251153. The next prime is 25001251309. The reversal of 25001251250 is 5215210052.

It can be written as a sum of positive squares in 5 ways, for example, as 3310736521 + 21690514729 = 57539^2 + 147277^2 .

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, 9999251 + ... + 10001750.

Almost surely, 2^25001251250 is an apocalyptic number.

25001251250 is a deficient number, since it is larger than the sum of its proper divisors (21861096436).

25001251250 is an equidigital number, since it uses as much as digits as its factorization.

25001251250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20001023 (or 20001008 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The spelling of 25001251250 in words is "twenty-five billion, one million, two hundred fifty-one thousand, two hundred fifty".