642173163 has 16 divisors (see below), whose sum is σ = 865728000. Its totient is φ = 423392480.

The previous prime is 642173131. The next prime is 642173167. The reversal of 642173163 is 361371246.

642173163 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 642173163 - 2⁵ = 642173131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642173167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103828 + ... + 109838.

It is an arithmetic number, because the mean of its divisors is an integer number (54108000).

Almost surely, 2^642173163 is an apocalyptic number.

642173163 is a deficient number, since it is larger than the sum of its proper divisors (223554837).

642173163 is a wasteful number, since it uses less digits than its factorization.

642173163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6402.

The product of its digits is 18144, while the sum is 33.

The square root of 642173163 is about 25341.1357874899. The cubic root of 642173163 is about 862.7481777732.

The spelling of 642173163 in words is "six hundred forty-two million, one hundred seventy-three thousand, one hundred sixty-three".