16908379120639 has 4 divisors (see below), whose sum is σ = 16925136682720. Its totient is φ = 16891621558560.

The previous prime is 16908379120603. The next prime is 16908379120663. The reversal of 16908379120639 is 93602197380961.

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 16908379120639 - 2²¹ = 16908377023487 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 (16908379124639) 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, 8378779527 + ... + 8378781544.

It is an arithmetic number, because the mean of its divisors is an integer number (4231284170680).

Almost surely, 2^{16908379120639} is an apocalyptic number.

16908379120639 is a deficient number, since it is larger than the sum of its proper divisors (16757562081).

16908379120639 is a wasteful number, since it uses less digits than its factorization.

16908379120639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16757562080.

The product of its (nonzero) digits is 26453952, while the sum is 64.

The spelling of 16908379120639 in words is "sixteen trillion, nine hundred eight billion, three hundred seventy-nine million, one hundred twenty thousand, six hundred thirty-nine".