25613875221 has 16 divisors (see below), whose sum is σ = 37423626240. Its totient is φ = 15453943920.

The previous prime is 25613875213. The next prime is 25613875249. The reversal of 25613875221 is 12257831652.

It is not a de Polignac number, because 25613875221 - 2³ = 25613875213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25613875121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1732951 + ... + 1747668.

It is an arithmetic number, because the mean of its divisors is an integer number (2338976640).

Almost surely, 2^25613875221 is an apocalyptic number.

It is an amenable number.

25613875221 is a deficient number, since it is larger than the sum of its proper divisors (11809751019).

25613875221 is a wasteful number, since it uses less digits than its factorization.

25613875221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3480856.

The product of its digits is 201600, while the sum is 42.

The spelling of 25613875221 in words is "twenty-five billion, six hundred thirteen million, eight hundred seventy-five thousand, two hundred twenty-one".