2158614639 has 6 divisors (see below), whose sum is σ = 3117998936. Its totient is φ = 1439076420.

The previous prime is 2158614631. The next prime is 2158614641. The reversal of 2158614639 is 9364168512.

2158614639 is a `hidden beast` number, since 2 + 1 + 5 + 8 + 6 + 1 + 4 + 639 = 666.

It is not a de Polignac number, because 2158614639 - 2³ = 2158614631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2158614594 and 2158614603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158614631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119923027 + ... + 119923044.

Almost surely, 2^2158614639 is an apocalyptic number.

2158614639 is a deficient number, since it is larger than the sum of its proper divisors (959384297).

2158614639 is a wasteful number, since it uses less digits than its factorization.

2158614639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239846077 (or 239846074 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 2158614639 is about 46460.8936526193. The cubic root of 2158614639 is about 1292.3843966008.

The spelling of 2158614639 in words is "two billion, one hundred fifty-eight million, six hundred fourteen thousand, six hundred thirty-nine".