2639124986 has 4 divisors (see below), whose sum is σ = 3958687482. Its totient is φ = 1319562492.

The previous prime is 2639124913. The next prime is 2639125003. The reversal of 2639124986 is 6894219362.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2552169361 + 86955625 = 50519^2 + 9325^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659781245 + ... + 659781248.

Almost surely, 2^2639124986 is an apocalyptic number.

2639124986 is a deficient number, since it is larger than the sum of its proper divisors (1319562496).

2639124986 is a wasteful number, since it uses less digits than its factorization.

2639124986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319562495.

The product of its digits is 1119744, while the sum is 50.

The square root of 2639124986 is about 51372.4146405442. The cubic root of 2639124986 is about 1381.9319342536.

The spelling of 2639124986 in words is "two billion, six hundred thirty-nine million, one hundred twenty-four thousand, nine hundred eighty-six".