16568985136 has 40 divisors (see below), whose sum is σ = 35124854544. Its totient is φ = 7508981760.

The previous prime is 16568985119. The next prime is 16568985271. The reversal of 16568985136 is 63158986561.

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, 80365 + ... + 198988.

Almost surely, 2^16568985136 is an apocalyptic number.

16568985136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16568985136 is an abundant number, since it is smaller than the sum of its proper divisors (18555869408).

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

16568985136 is a wasteful number, since it uses less digits than its factorization.

16568985136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279709 (or 279703 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 58.

The spelling of 16568985136 in words is "sixteen billion, five hundred sixty-eight million, nine hundred eighty-five thousand, one hundred thirty-six".