16858115956 has 24 divisors (see below), whose sum is σ = 32325473376. Its totient is φ = 7629018720.

The previous prime is 16858115941. The next prime is 16858116031. The reversal of 16858115956 is 65951185861.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 16858115897 and 16858115906.

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, 833931 + ... + 853906.

It is an arithmetic number, because the mean of its divisors is an integer number (1346894724).

Almost surely, 2^16858115956 is an apocalyptic number.

It is an amenable number.

16858115956 is a deficient number, since it is larger than the sum of its proper divisors (15467357420).

16858115956 is a wasteful number, since it uses less digits than its factorization.

16858115956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688079 (or 1688077 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 55.

The spelling of 16858115956 in words is "sixteen billion, eight hundred fifty-eight million, one hundred fifteen thousand, nine hundred fifty-six".