25044040872 has 24 divisors (see below), whose sum is σ = 67827610890. Its totient is φ = 8348013600.

The previous prime is 25044040829. The next prime is 25044040877. The reversal of 25044040872 is 27804044052.

25044040872 is a `hidden beast` number, since 2 + 504 + 40 + 40 + 8 + 72 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22250495556 + 2793545316 = 149166^2 + 52854^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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

It is not an unprimeable number, because it can be changed into a prime (25044040877) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 173916879 + ... + 173917022.

Almost surely, 2^25044040872 is an apocalyptic number.

It is an amenable number.

25044040872 is an abundant number, since it is smaller than the sum of its proper divisors (42783570018).

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

25044040872 is a wasteful number, since it uses less digits than its factorization.

25044040872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347833913 (or 347833906 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 36.

The spelling of 25044040872 in words is "twenty-five billion, forty-four million, forty thousand, eight hundred seventy-two".