642754213922 has 16 divisors (see below), whose sum is σ = 978105590592. Its totient is φ = 316748592720.

The previous prime is 642754213823. The next prime is 642754213943. The reversal of 642754213922 is 229312457246.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7350293 + ... + 7437224.

It is an arithmetic number, because the mean of its divisors is an integer number (61131599412).

Almost surely, 2^642754213922 is an apocalyptic number.

642754213922 is a deficient number, since it is larger than the sum of its proper divisors (335351376670).

642754213922 is a wasteful number, since it uses less digits than its factorization.

642754213922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14787833.

The product of its digits is 1451520, while the sum is 47.

The spelling of 642754213922 in words is "six hundred forty-two billion, seven hundred fifty-four million, two hundred thirteen thousand, nine hundred twenty-two".