25115421372 has 48 divisors (see below), whose sum is σ = 59668358400. Its totient is φ = 8219908480.

The previous prime is 25115421371. The next prime is 25115421379. The reversal of 25115421372 is 27312451152.

It is a happy number.

It is a super-2 number, since 2×25115421372² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25115421371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 572872 + ... + 615152.

It is an arithmetic number, because the mean of its divisors is an integer number (1243090800).

Almost surely, 2^25115421372 is an apocalyptic number.

It is an amenable number.

25115421372 is an abundant number, since it is smaller than the sum of its proper divisors (34552937028).

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

25115421372 is a wasteful number, since it uses less digits than its factorization.

25115421372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43186 (or 43184 counting only the distinct ones).

The product of its digits is 16800, while the sum is 33.

The spelling of 25115421372 in words is "twenty-five billion, one hundred fifteen million, four hundred twenty-one thousand, three hundred seventy-two".