679744391841 has 6 divisors (see below), whose sum is σ = 981853010450. Its totient is φ = 453162927888.

The previous prime is 679744391831. The next prime is 679744391863. The reversal of 679744391841 is 148193447976.

679744391841 is a `hidden beast` number, since 6 + 7 + 9 + 7 + 443 + 9 + 184 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 391745802816 + 287998589025 = 625896^2 + 536655^2 .

It is not a de Polignac number, because 679744391841 - 2⁷ = 679744391713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679744391831) 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 5 ways as a sum of consecutive naturals, for example, 37763577316 + ... + 37763577333.

Almost surely, 2^679744391841 is an apocalyptic number.

It is an amenable number.

679744391841 is a deficient number, since it is larger than the sum of its proper divisors (302108618609).

679744391841 is a wasteful number, since it uses less digits than its factorization.

679744391841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75527154655 (or 75527154652 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 63.

The spelling of 679744391841 in words is "six hundred seventy-nine billion, seven hundred forty-four million, three hundred ninety-one thousand, eight hundred forty-one".