642192812 has 6 divisors (see below), whose sum is σ = 1123837428. Its totient is φ = 321096404.

The previous prime is 642192809. The next prime is 642192827. The reversal of 642192812 is 218291246.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80274098 + ... + 80274105.

It is an arithmetic number, because the mean of its divisors is an integer number (187306238).

Almost surely, 2^642192812 is an apocalyptic number.

It is an amenable number.

642192812 is a deficient number, since it is larger than the sum of its proper divisors (481644616).

642192812 is a wasteful number, since it uses less digits than its factorization.

642192812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160548207 (or 160548205 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 642192812 is about 25341.5234743296. The cubic root of 642192812 is about 862.7569770437.

The spelling of 642192812 in words is "six hundred forty-two million, one hundred ninety-two thousand, eight hundred twelve".