642919513506 has 8 divisors (see below), whose sum is σ = 1285839027024. Its totient is φ = 214306504500.

The previous prime is 642919513447. The next prime is 642919513541. The reversal of 642919513506 is 605315919246.

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

642919513506 is an admirable 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, 53576626120 + ... + 53576626131.

It is an arithmetic number, because the mean of its divisors is an integer number (160729878378).

Almost surely, 2^642919513506 is an apocalyptic number.

642919513506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642919513506 is a wasteful number, since it uses less digits than its factorization.

642919513506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107153252256.

The product of its (nonzero) digits is 1749600, while the sum is 51.

The spelling of 642919513506 in words is "six hundred forty-two billion, nine hundred nineteen million, five hundred thirteen thousand, five hundred six".