642805858958 has 8 divisors (see below), whose sum is σ = 964213460280. Its totient is φ = 321401372200.

The previous prime is 642805858913. The next prime is 642805858979. The reversal of 642805858958 is 859858508246.

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

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, 166388 + ... + 1145991.

It is an arithmetic number, because the mean of its divisors is an integer number (120526682535).

Almost surely, 2^642805858958 is an apocalyptic number.

642805858958 is a deficient number, since it is larger than the sum of its proper divisors (321407601322).

642805858958 is a wasteful number, since it uses less digits than its factorization.

642805858958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557282.

The product of its (nonzero) digits is 221184000, while the sum is 68.

The spelling of 642805858958 in words is "six hundred forty-two billion, eight hundred five million, eight hundred fifty-eight thousand, nine hundred fifty-eight".