16841620868 has 6 divisors (see below), whose sum is σ = 29472836526. Its totient is φ = 8420810432.

The previous prime is 16841620853. The next prime is 16841620871. The reversal of 16841620868 is 86802614861.

It can be written as a sum of positive squares in only one way, i.e., 14436503104 + 2405117764 = 120152^2 + 49042^2 .

It is a super-2 number, since 2×16841620868² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2105202605 + ... + 2105202612.

It is an arithmetic number, because the mean of its divisors is an integer number (4912139421).

Almost surely, 2^16841620868 is an apocalyptic number.

It is an amenable number.

16841620868 is a deficient number, since it is larger than the sum of its proper divisors (12631215658).

16841620868 is a wasteful number, since it uses less digits than its factorization.

16841620868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4210405221 (or 4210405219 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 50.

The spelling of 16841620868 in words is "sixteen billion, eight hundred forty-one million, six hundred twenty thousand, eight hundred sixty-eight".