642464060616 has 64 divisors (see below), whose sum is σ = 2039568451200. Its totient is φ = 183561159744.

The previous prime is 642464060597. The next prime is 642464060663. The reversal of 642464060616 is 616060464246.

642464060616 is a `hidden beast` number, since 6 + 4 + 24 + 6 + 4 + 0 + 6 + 0 + 616 = 666.

642464060616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212453535 + ... + 212456558.

It is an arithmetic number, because the mean of its divisors is an integer number (31868257050).

Almost surely, 2^642464060616 is an apocalyptic number.

It is an amenable number.

642464060616 is an abundant number, since it is smaller than the sum of its proper divisors (1397104390584).

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

642464060616 is a wasteful number, since it uses less digits than its factorization.

642464060616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424910115 (or 424910105 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 45.

The spelling of 642464060616 in words is "six hundred forty-two billion, four hundred sixty-four million, sixty thousand, six hundred sixteen".