646118118 has 48 divisors (see below), whose sum is σ = 1451174400. Its totient is φ = 207625968.

The previous prime is 646118117. The next prime is 646118119. The reversal of 646118118 is 811811646.

646118118 is a `hidden beast` number, since 6 + 461 + 181 + 18 = 666.

It is an interprime number because it is at equal distance from previous prime (646118117) and next prime (646118119).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646118111) 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, 50983 + ... + 62381.

It is an arithmetic number, because the mean of its divisors is an integer number (30232800).

Almost surely, 2^646118118 is an apocalyptic number.

646118118 is an abundant number, since it is smaller than the sum of its proper divisors (805056282).

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

646118118 is a wasteful number, since it uses less digits than its factorization.

646118118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11521 (or 11518 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 646118118 is about 25418.8535933468. The cubic root of 646118118 is about 864.5112313296.

The spelling of 646118118 in words is "six hundred forty-six million, one hundred eighteen thousand, one hundred eighteen".