16861155808 has 48 divisors (see below), whose sum is σ = 38417863680. Its totient is φ = 7134731136.

The previous prime is 16861155761. The next prime is 16861155811. The reversal of 16861155808 is 80855116861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458716 + ... + 494107.

It is an arithmetic number, because the mean of its divisors is an integer number (800372160).

Almost surely, 2^16861155808 is an apocalyptic number.

It is an amenable number.

16861155808 is an abundant number, since it is smaller than the sum of its proper divisors (21556707872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16861155808 is an equidigital number, since it uses as much as digits as its factorization.

16861155808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952919 (or 952911 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 49.

The spelling of 16861155808 in words is "sixteen billion, eight hundred sixty-one million, one hundred fifty-five thousand, eight hundred eight".