642073009922 has 32 divisors (see below), whose sum is σ = 1003816195200. Its totient is φ = 307635205248.

The previous prime is 642073009901. The next prime is 642073009927. The reversal of 642073009922 is 229900370246.

It is not an unprimeable number, because it can be changed into a prime (642073009927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67846163 + ... + 67855625.

It is an arithmetic number, because the mean of its divisors is an integer number (31369256100).

Almost surely, 2^642073009922 is an apocalyptic number.

642073009922 is a deficient number, since it is larger than the sum of its proper divisors (361743185278).

642073009922 is a wasteful number, since it uses less digits than its factorization.

642073009922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18170.

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 642073009922 in words is "six hundred forty-two billion, seventy-three million, nine thousand, nine hundred twenty-two".