618917868 has 24 divisors (see below), whose sum is σ = 1604602160. Its totient is φ = 206305920.

The previous prime is 618917857. The next prime is 618917869. The reversal of 618917868 is 868719816.

618917868 is a `hidden beast` number, since 618 + 9 + 17 + 8 + 6 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (618917869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2865253 + ... + 2865468.

Almost surely, 2^618917868 is an apocalyptic number.

It is an amenable number.

618917868 is an abundant number, since it is smaller than the sum of its proper divisors (985684292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

618917868 is a wasteful number, since it uses less digits than its factorization.

618917868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5730734 (or 5730726 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The square root of 618917868 is about 24878.0599725943. The cubic root of 618917868 is about 852.2055147950.

The spelling of 618917868 in words is "six hundred eighteen million, nine hundred seventeen thousand, eight hundred sixty-eight".