618668632 has 32 divisors (see below), whose sum is σ = 1174403520. Its totient is φ = 305510400.

The previous prime is 618668623. The next prime is 618668657. The reversal of 618668632 is 236866816.

It is a congruent number.

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, 465553 + ... + 466879.

It is an arithmetic number, because the mean of its divisors is an integer number (36700110).

Almost surely, 2^618668632 is an apocalyptic number.

It is an amenable number.

618668632 is a deficient number, since it is larger than the sum of its proper divisors (555734888).

618668632 is a wasteful number, since it uses less digits than its factorization.

618668632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011 (or 2007 counting only the distinct ones).

The product of its digits is 497664, while the sum is 46.

The square root of 618668632 is about 24873.0503155524. The cubic root of 618668632 is about 852.0911060708.

The spelling of 618668632 in words is "six hundred eighteen million, six hundred sixty-eight thousand, six hundred thirty-two".