642695964712 has 16 divisors (see below), whose sum is σ = 1233079467840. Its totient is φ = 313874773296.

The previous prime is 642695964697. The next prime is 642695964739. The reversal of 642695964712 is 217469596246.

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, 934150768 + ... + 934151455.

It is an arithmetic number, because the mean of its divisors is an integer number (77067466740).

Almost surely, 2^642695964712 is an apocalyptic number.

It is an amenable number.

642695964712 is a deficient number, since it is larger than the sum of its proper divisors (590383503128).

642695964712 is a wasteful number, since it uses less digits than its factorization.

642695964712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868302272 (or 1868302268 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 61.

The spelling of 642695964712 in words is "six hundred forty-two billion, six hundred ninety-five million, nine hundred sixty-four thousand, seven hundred twelve".