16939866527999 has 4 divisors (see below), whose sum is σ = 17069178486360. Its totient is φ = 16810554569640.

The previous prime is 16939866527981. The next prime is 16939866528047. The reversal of 16939866527999 is 99972566893961.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16939866527999 - 2²⁰ = 16939865479423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16939866527959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64655978984 + ... + 64655979245.

It is an arithmetic number, because the mean of its divisors is an integer number (4267294621590).

Almost surely, 2^{16939866527999} is an apocalyptic number.

16939866527999 is a deficient number, since it is larger than the sum of its proper divisors (129311958361).

16939866527999 is a wasteful number, since it uses less digits than its factorization.

16939866527999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129311958360.

The product of its digits is 21427701120, while the sum is 89.

The spelling of 16939866527999 in words is "sixteen trillion, nine hundred thirty-nine billion, eight hundred sixty-six million, five hundred twenty-seven thousand, nine hundred ninety-nine".