16323973504 has 32 divisors (see below), whose sum is σ = 32932087200. Its totient is φ = 8058665472.

The previous prime is 16323973469. The next prime is 16323973543. The reversal of 16323973504 is 40537932361.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×16323973504² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 797047 + ... + 817270.

It is an arithmetic number, because the mean of its divisors is an integer number (1029127725).

Almost surely, 2^16323973504 is an apocalyptic number.

It is an amenable number.

16323973504 is an abundant number, since it is smaller than the sum of its proper divisors (16608113696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16323973504 is an equidigital number, since it uses as much as digits as its factorization.

16323973504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614410 (or 1614398 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 43.

The spelling of 16323973504 in words is "sixteen billion, three hundred twenty-three million, nine hundred seventy-three thousand, five hundred four".