164442560631 has 4 divisors (see below), whose sum is σ = 219256747512. Its totient is φ = 109628373752.

The previous prime is 164442560591. The next prime is 164442560687. The reversal of 164442560631 is 136065244461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 164442560631 - 2¹¹ = 164442558583 is a prime.

It is a super-2 number, since 2×164442560631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164442560231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27407093436 + ... + 27407093441.

It is an arithmetic number, because the mean of its divisors is an integer number (54814186878).

Almost surely, 2^164442560631 is an apocalyptic number.

164442560631 is a deficient number, since it is larger than the sum of its proper divisors (54814186881).

164442560631 is an equidigital number, since it uses as much as digits as its factorization.

164442560631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54814186880.

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 164442560631 in words is "one hundred sixty-four billion, four hundred forty-two million, five hundred sixty thousand, six hundred thirty-one".