16688823613 has 24 divisors (see below), whose sum is σ = 21224065824. Its totient is φ = 12976236000.

The previous prime is 16688823509. The next prime is 16688823617. The reversal of 16688823613 is 31632888661.

It is not a de Polignac number, because 16688823613 - 2²¹ = 16686726461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16688823617) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 218563 + ... + 284863.

It is an arithmetic number, because the mean of its divisors is an integer number (884336076).

Almost surely, 2^16688823613 is an apocalyptic number.

It is an amenable number.

16688823613 is a deficient number, since it is larger than the sum of its proper divisors (4535242211).

16688823613 is a wasteful number, since it uses less digits than its factorization.

16688823613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66793 (or 66786 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 52.

The spelling of 16688823613 in words is "sixteen billion, six hundred eighty-eight million, eight hundred twenty-three thousand, six hundred thirteen".