216734253939 has 24 divisors (see below), whose sum is σ = 357796624640. Its totient is φ = 123843612528.

The previous prime is 216734253919. The next prime is 216734254007. The reversal of 216734253939 is 939352437612.

216734253939 is a `hidden beast` number, since 2 + 1 + 6 + 73 + 4 + 2 + 539 + 39 = 666.

It is not a de Polignac number, because 216734253939 - 2¹⁶ = 216734188403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216734253919) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2482572 + ... + 2568390.

Almost surely, 2^216734253939 is an apocalyptic number.

216734253939 is a deficient number, since it is larger than the sum of its proper divisors (141062370701).

216734253939 is a wasteful number, since it uses less digits than its factorization.

216734253939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125919 (or 125916 counting only the distinct ones).

The product of its digits is 7348320, while the sum is 54.

The spelling of 216734253939 in words is "two hundred sixteen billion, seven hundred thirty-four million, two hundred fifty-three thousand, nine hundred thirty-nine".