16851215934 has 72 divisors (see below), whose sum is σ = 42983839080. Its totient is φ = 4756604832.

The previous prime is 16851215929. The next prime is 16851215951. The reversal of 16851215934 is 43951215861.

It is a happy number.

16851215934 is a `hidden beast` number, since 1 + 6 + 8 + 51 + 2 + 1 + 593 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 16851215934.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 41889 + ... + 188300.

It is an arithmetic number, because the mean of its divisors is an integer number (596997765).

Almost surely, 2^16851215934 is an apocalyptic number.

16851215934 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16851215934 is an abundant number, since it is smaller than the sum of its proper divisors (26132623146).

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

16851215934 is a wasteful number, since it uses less digits than its factorization.

16851215934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230294 (or 230284 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The spelling of 16851215934 in words is "sixteen billion, eight hundred fifty-one million, two hundred fifteen thousand, nine hundred thirty-four".