642118914 has 40 divisors (see below), whose sum is σ = 1472298960. Its totient is φ = 209059704.

The previous prime is 642118907. The next prime is 642118921. The reversal of 642118914 is 419811246.

642118914 is a `hidden beast` number, since 642 + 1 + 1 + 8 + 9 + 1 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (642118907) and next prime (642118921).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 39124 + ... + 53055.

It is an arithmetic number, because the mean of its divisors is an integer number (36807474).

Almost surely, 2^642118914 is an apocalyptic number.

642118914 is an abundant number, since it is smaller than the sum of its proper divisors (830180046).

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

642118914 is a wasteful number, since it uses less digits than its factorization.

642118914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92236 (or 92227 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 642118914 is about 25340.0653906023. The cubic root of 642118914 is about 862.7238829015.

The spelling of 642118914 in words is "six hundred forty-two million, one hundred eighteen thousand, nine hundred fourteen".