16504644031 has 4 divisors (see below), whose sum is σ = 16506007864. Its totient is φ = 16503280200.

The previous prime is 16504644007. The next prime is 16504644047. The reversal of 16504644031 is 13044640561.

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 16504644031 - 2¹¹ = 16504641983 is a prime.

It is a super-2 number, since 2×16504644031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16504642031) 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, 663600 + ... + 688021.

It is an arithmetic number, because the mean of its divisors is an integer number (4126501966).

Almost surely, 2^16504644031 is an apocalyptic number.

16504644031 is a deficient number, since it is larger than the sum of its proper divisors (1363833).

16504644031 is a wasteful number, since it uses less digits than its factorization.

16504644031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363832.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 16504644031 in words is "sixteen billion, five hundred four million, six hundred forty-four thousand, thirty-one".