16813655985 has 32 divisors (see below), whose sum is σ = 30752317440. Its totient is φ = 7684406208.

The previous prime is 16813655977. The next prime is 16813655993. The reversal of 16813655985 is 58955631861.

It is a happy number.

16813655985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16813655977) and next prime (16813655993).

It is not a de Polignac number, because 16813655985 - 2³ = 16813655977 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 485476 + ... + 518954.

It is an arithmetic number, because the mean of its divisors is an integer number (961009920).

Almost surely, 2^16813655985 is an apocalyptic number.

16813655985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16813655985 is a deficient number, since it is larger than the sum of its proper divisors (13938661455).

16813655985 is a wasteful number, since it uses less digits than its factorization.

16813655985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38277.

The product of its digits is 7776000, while the sum is 57.

The spelling of 16813655985 in words is "sixteen billion, eight hundred thirteen million, six hundred fifty-five thousand, nine hundred eighty-five".