642955342334 has 8 divisors (see below), whose sum is σ = 995543755968. Its totient is φ = 311107423680.

The previous prime is 642955342273. The next prime is 642955342343. The reversal of 642955342334 is 433243559246.

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

It is a super-2 number, since 2×642955342334² (a number of 24 digits) contains 22 as substring.

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, 5185123667 + ... + 5185123790.

It is an arithmetic number, because the mean of its divisors is an integer number (124442969496).

Almost surely, 2^642955342334 is an apocalyptic number.

642955342334 is a deficient number, since it is larger than the sum of its proper divisors (352588413634).

642955342334 is a wasteful number, since it uses less digits than its factorization.

642955342334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10370247490.

The product of its digits is 9331200, while the sum is 50.

The spelling of 642955342334 in words is "six hundred forty-two billion, nine hundred fifty-five million, three hundred forty-two thousand, three hundred thirty-four".