12164455531 has 4 divisors (see below), whose sum is σ = 12227483992. Its totient is φ = 12101427072.

The previous prime is 12164455493. The next prime is 12164455543. The reversal of 12164455531 is 13555446121.

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 12164455531 - 2²⁵ = 12130901099 is a prime.

It is a super-2 number, since 2×12164455531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12164455561) 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 3 ways as a sum of consecutive naturals, for example, 31513941 + ... + 31514326.

It is an arithmetic number, because the mean of its divisors is an integer number (3056870998).

Almost surely, 2^12164455531 is an apocalyptic number.

12164455531 is a deficient number, since it is larger than the sum of its proper divisors (63028461).

12164455531 is an equidigital number, since it uses as much as digits as its factorization.

12164455531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63028460.

The product of its digits is 72000, while the sum is 37.

The spelling of 12164455531 in words is "twelve billion, one hundred sixty-four million, four hundred fifty-five thousand, five hundred thirty-one".