2500138879 has 16 divisors (see below), whose sum is σ = 2895473152. Its totient is φ = 2114499168.

The previous prime is 2500138867. The next prime is 2500138889. The reversal of 2500138879 is 9788310052.

It is a cyclic number.

It is not a de Polignac number, because 2500138879 - 2¹⁵ = 2500106111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2500138829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197917 + ... + 210169.

It is an arithmetic number, because the mean of its divisors is an integer number (180967072).

Almost surely, 2^2500138879 is an apocalyptic number.

2500138879 is a deficient number, since it is larger than the sum of its proper divisors (395334273).

2500138879 is a wasteful number, since it uses less digits than its factorization.

2500138879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12646.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 2500138879 is about 50001.3887707132. The cubic root of 2500138879 is about 1357.2339395390.

The spelling of 2500138879 in words is "two billion, five hundred million, one hundred thirty-eight thousand, eight hundred seventy-nine".