25530511250 has 20 divisors (see below), whose sum is σ = 47854392630. Its totient is φ = 10212204000.

The previous prime is 25530511199. The next prime is 25530511319. The reversal of 25530511250 is 5211503552.

It can be written as a sum of positive squares in 5 ways, for example, as 6295081 + 25524216169 = 2509^2 + 159763^2 .

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, 10210955 + ... + 10213454.

Almost surely, 2^25530511250 is an apocalyptic number.

25530511250 is a deficient number, since it is larger than the sum of its proper divisors (22323881380).

25530511250 is an equidigital number, since it uses as much as digits as its factorization.

25530511250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20424431 (or 20424416 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

The spelling of 25530511250 in words is "twenty-five billion, five hundred thirty million, five hundred eleven thousand, two hundred fifty".