1696779868139 has 8 divisors (see below), whose sum is σ = 1712856172608. Its totient is φ = 1680707611080.

The previous prime is 1696779868127. The next prime is 1696779868163. The reversal of 1696779868139 is 9318689776961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1696779868139 - 2²⁸ = 1696511432683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1696779868169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166097 + ... + 1849634.

It is an arithmetic number, because the mean of its divisors is an integer number (214107021576).

Almost surely, 2^{1696779868139} is an apocalyptic number.

1696779868139 is a deficient number, since it is larger than the sum of its proper divisors (16076304469).

1696779868139 is a wasteful number, since it uses less digits than its factorization.

1696779868139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023705.

The product of its digits is 1481421312, while the sum is 80.

The spelling of 1696779868139 in words is "one trillion, six hundred ninety-six billion, seven hundred seventy-nine million, eight hundred sixty-eight thousand, one hundred thirty-nine".