25211655072 has 72 divisors (see below), whose sum is σ = 72091901700. Its totient is φ = 8357437440.

The previous prime is 25211655067. The next prime is 25211655083. The reversal of 25211655072 is 27055611252.

25211655072 is a `hidden beast` number, since 2 + 5 + 21 + 16 + 550 + 72 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16755749136 + 8455905936 = 129444^2 + 91956^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189697 + ... + 293952.

Almost surely, 2^25211655072 is an apocalyptic number.

It is an amenable number.

25211655072 is an abundant number, since it is smaller than the sum of its proper divisors (46880246628).

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

25211655072 is a wasteful number, since it uses less digits than its factorization.

25211655072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483846 (or 483835 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The spelling of 25211655072 in words is "twenty-five billion, two hundred eleven million, six hundred fifty-five thousand, seventy-two".