69697838691 has 16 divisors (see below), whose sum is σ = 111198831520. Its totient is φ = 42890977440.

The previous prime is 69697838669. The next prime is 69697838731. The reversal of 69697838691 is 19683879696.

69697838691 is a `hidden beast` number, since 6 + 96 + 9 + 78 + 386 + 91 = 666.

It is not a de Polignac number, because 69697838691 - 2⁹ = 69697838179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69697838611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99284320 + ... + 99285021.

It is an arithmetic number, because the mean of its divisors is an integer number (6949926970).

Almost surely, 2^69697838691 is an apocalyptic number.

69697838691 is a deficient number, since it is larger than the sum of its proper divisors (41500992829).

69697838691 is a wasteful number, since it uses less digits than its factorization.

69697838691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198569363 (or 198569357 counting only the distinct ones).

The product of its digits is 211631616, while the sum is 72.

The spelling of 69697838691 in words is "sixty-nine billion, six hundred ninety-seven million, eight hundred thirty-eight thousand, six hundred ninety-one".