691112284379 has 16 divisors (see below), whose sum is σ = 799166601216. Its totient is φ = 590676777600.

The previous prime is 691112284333. The next prime is 691112284399. The reversal of 691112284379 is 973482211196.

It is not a de Polignac number, because 691112284379 - 2⁸ = 691112284123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 691112284379.

It is not an unprimeable number, because it can be changed into a prime (691112284399) 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, 1858067 + ... + 2198780.

It is an arithmetic number, because the mean of its divisors is an integer number (49947912576).

Almost surely, 2^691112284379 is an apocalyptic number.

691112284379 is a deficient number, since it is larger than the sum of its proper divisors (108054316837).

691112284379 is a wasteful number, since it uses less digits than its factorization.

691112284379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4057786.

The product of its digits is 1306368, while the sum is 53.

The spelling of 691112284379 in words is "six hundred ninety-one billion, one hundred twelve million, two hundred eighty-four thousand, three hundred seventy-nine".