2639128925 has 24 divisors (see below), whose sum is σ = 3315174720. Its totient is φ = 2083968000.

The previous prime is 2639128897. The next prime is 2639128981. The reversal of 2639128925 is 5298219362.

It is not a de Polignac number, because 2639128925 - 2³⁰ = 1565387101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2639128925.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 613181 + ... + 617469.

It is an arithmetic number, because the mean of its divisors is an integer number (138132280).

Almost surely, 2^2639128925 is an apocalyptic number.

2639128925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2639128925 is a deficient number, since it is larger than the sum of its proper divisors (676045795).

2639128925 is a wasteful number, since it uses less digits than its factorization.

2639128925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4613 (or 4608 counting only the distinct ones).

The product of its digits is 466560, while the sum is 47.

The square root of 2639128925 is about 51372.4529782256. The cubic root of 2639128925 is about 1381.9326217829.

The spelling of 2639128925 in words is "two billion, six hundred thirty-nine million, one hundred twenty-eight thousand, nine hundred twenty-five".