16499871631 has 4 divisors (see below), whose sum is σ = 16537457200. Its totient is φ = 16462286064.

The previous prime is 16499871617. The next prime is 16499871637. The reversal of 16499871631 is 13617899461.

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 16499871631 - 2¹³ = 16499863439 is a prime.

It is a super-2 number, since 2×16499871631² (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 (16499871637) 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, 18792126 + ... + 18793003.

It is an arithmetic number, because the mean of its divisors is an integer number (4134364300).

Almost surely, 2^16499871631 is an apocalyptic number.

16499871631 is a deficient number, since it is larger than the sum of its proper divisors (37585569).

16499871631 is an equidigital number, since it uses as much as digits as its factorization.

16499871631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37585568.

The product of its digits is 1959552, while the sum is 55.

The spelling of 16499871631 in words is "sixteen billion, four hundred ninety-nine million, eight hundred seventy-one thousand, six hundred thirty-one".