25521703272 has 48 divisors (see below), whose sum is σ = 74438303940. Its totient is φ = 7852831488.

The previous prime is 25521703243. The next prime is 25521703309. The reversal of 25521703272 is 27230712552.

25521703272 is a `hidden beast` number, since 2 + 552 + 1 + 7 + 0 + 32 + 72 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25336362276 + 185340996 = 159174^2 + 13614^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13632453 + ... + 13634324.

Almost surely, 2^25521703272 is an apocalyptic number.

It is an amenable number.

25521703272 is an abundant number, since it is smaller than the sum of its proper divisors (48916600668).

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

25521703272 is a wasteful number, since it uses less digits than its factorization.

25521703272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27266802 (or 27266795 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The spelling of 25521703272 in words is "twenty-five billion, five hundred twenty-one million, seven hundred three thousand, two hundred seventy-two".