642213718502 has 8 divisors (see below), whose sum is σ = 996538528800. Its totient is φ = 310034208904.

The previous prime is 642213718477. The next prime is 642213718519. The reversal of 642213718502 is 205817312246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 642213718502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5536325102 + ... + 5536325217.

It is an arithmetic number, because the mean of its divisors is an integer number (124567316100).

Almost surely, 2^642213718502 is an apocalyptic number.

642213718502 is a deficient number, since it is larger than the sum of its proper divisors (354324810298).

642213718502 is a wasteful number, since it uses less digits than its factorization.

642213718502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11072650350.

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 642213718502 in words is "six hundred forty-two billion, two hundred thirteen million, seven hundred eighteen thousand, five hundred two".