618688018 has 16 divisors (see below), whose sum is σ = 1031659776. Its totient is φ = 276336720.

The previous prime is 618687997. The next prime is 618688079. The reversal of 618688018 is 810886816.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382996 + ... + 384607.

It is an arithmetic number, because the mean of its divisors is an integer number (64478736).

Almost surely, 2^618688018 is an apocalyptic number.

618688018 is a deficient number, since it is larger than the sum of its proper divisors (412971758).

618688018 is a wasteful number, since it uses less digits than its factorization.

618688018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767649.

The product of its (nonzero) digits is 147456, while the sum is 46.

The square root of 618688018 is about 24873.4400113856. The cubic root of 618688018 is about 852.1000060779.

The spelling of 618688018 in words is "six hundred eighteen million, six hundred eighty-eight thousand, eighteen".