16615813823 has 16 divisors (see below), whose sum is σ = 20004568320. Its totient is φ = 13481997696.

The previous prime is 16615813811. The next prime is 16615813849. The reversal of 16615813823 is 32831851661.

It is a cyclic number.

It is not a de Polignac number, because 16615813823 - 2¹⁴ = 16615797439 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 (16615813853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124340 + ... + 220662.

It is an arithmetic number, because the mean of its divisors is an integer number (1250285520).

Almost surely, 2^16615813823 is an apocalyptic number.

16615813823 is a deficient number, since it is larger than the sum of its proper divisors (3388754497).

16615813823 is a wasteful number, since it uses less digits than its factorization.

16615813823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97646.

The product of its digits is 207360, while the sum is 44.

The spelling of 16615813823 in words is "sixteen billion, six hundred fifteen million, eight hundred thirteen thousand, eight hundred twenty-three".