679162236769 has 9 divisors (see below), whose sum is σ = 709994705329. Its totient is φ = 649615313380.

The previous prime is 679162236757. The next prime is 679162236791. The reversal of 679162236769 is 967632261976.

The square root of 679162236769 is 824113.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 679162236769 - 2¹¹ = 679162234721 is a prime.

It is a super-2 number, since 2×679162236769² (a number of 24 digits) contains 22 as substring.

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 679162236769.

It is not an unprimeable number, because it can be changed into a prime (679162234769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 18936684 + ... + 18972514.

Almost surely, 2^679162236769 is an apocalyptic number.

679162236769 is the 824113-rd square number.

679162236769 is the 412057-th centered octagonal number.

It is an amenable number.

679162236769 is a deficient number, since it is larger than the sum of its proper divisors (30832468560).

679162236769 is an frugal number, since it uses more digits than its factorization.

679162236769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71708 (or 35854 counting only the distinct ones).

The product of its digits is 61725888, while the sum is 64.

Multiplying 679162236769 by its sum of digits (64), we get a square (43466383153216 = 6592904²).

The spelling of 679162236769 in words is "six hundred seventy-nine billion, one hundred sixty-two million, two hundred thirty-six thousand, seven hundred sixty-nine".