642699930814 has 4 divisors (see below), whose sum is σ = 964049896224. Its totient is φ = 321349965406.

The previous prime is 642699930737. The next prime is 642699930833. The reversal of 642699930814 is 418039996246.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160674982702 + ... + 160674982705.

It is an arithmetic number, because the mean of its divisors is an integer number (241012474056).

Almost surely, 2^642699930814 is an apocalyptic number.

642699930814 is a deficient number, since it is larger than the sum of its proper divisors (321349965410).

642699930814 is a wasteful number, since it uses less digits than its factorization.

642699930814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321349965409.

The product of its (nonzero) digits is 20155392, while the sum is 61.

The spelling of 642699930814 in words is "six hundred forty-two billion, six hundred ninety-nine million, nine hundred thirty thousand, eight hundred fourteen".