2640139192 has 16 divisors (see below), whose sum is σ = 4999275000. Its totient is φ = 1306999200.

The previous prime is 2640139141. The next prime is 2640139213. The reversal of 2640139192 is 2919310462.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1632942 + ... + 1634557.

Almost surely, 2^2640139192 is an apocalyptic number.

It is an amenable number.

2640139192 is a deficient number, since it is larger than the sum of its proper divisors (2359135808).

2640139192 is a wasteful number, since it uses less digits than its factorization.

2640139192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3267606 (or 3267602 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 2640139192 is about 51382.2848071201. The cubic root of 2640139192 is about 1382.1089353640.

The spelling of 2640139192 in words is "two billion, six hundred forty million, one hundred thirty-nine thousand, one hundred ninety-two".