618255518277231 has 12 divisors (see below), whose sum is σ = 893066404857640. Its totient is φ = 412156196486640.

The previous prime is 618255518277203. The next prime is 618255518277259. The reversal of 618255518277231 is 132772815552816.

618255518277231 is a `hidden beast` number, since 6 + 1 + 8 + 2 + 5 + 551 + 8 + 2 + 7 + 72 + 3 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (618255518277203) and next prime (618255518277259).

It is a de Polignac number, because none of the positive numbers 2^k-618255518277231 is a prime.

It is a super-2 number, since 2×618255518277231² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618255518277431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1178809216 + ... + 1179333573.

Almost surely, 2^{618255518277231} is an apocalyptic number.

618255518277231 is a deficient number, since it is larger than the sum of its proper divisors (274810886580409).

618255518277231 is a wasteful number, since it uses less digits than its factorization.

618255518277231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358171926 (or 2358171923 counting only the distinct ones).

The product of its digits is 56448000, while the sum is 63.

The spelling of 618255518277231 in words is "six hundred eighteen trillion, two hundred fifty-five billion, five hundred eighteen million, two hundred seventy-seven thousand, two hundred thirty-one".