642914868722 has 8 divisors (see below), whose sum is σ = 1102139774976. Its totient is φ = 275534943732.

The previous prime is 642914868697. The next prime is 642914868751. The reversal of 642914868722 is 227868419246.

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

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, 22961245298 + ... + 22961245325.

It is an arithmetic number, because the mean of its divisors is an integer number (137767471872).

Almost surely, 2^642914868722 is an apocalyptic number.

642914868722 is a deficient number, since it is larger than the sum of its proper divisors (459224906254).

642914868722 is a wasteful number, since it uses less digits than its factorization.

642914868722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45922490632.

The product of its digits is 18579456, while the sum is 59.

The spelling of 642914868722 in words is "six hundred forty-two billion, nine hundred fourteen million, eight hundred sixty-eight thousand, seven hundred twenty-two".