83779393617 has 12 divisors (see below), whose sum is σ = 121220845200. Its totient is φ = 55757775768.

The previous prime is 83779393601. The next prime is 83779393717. The reversal of 83779393617 is 71639397738.

83779393617 is a `hidden beast` number, since 8 + 3 + 7 + 7 + 9 + 3 + 9 + 3 + 617 = 666.

It is not a de Polignac number, because 83779393617 - 2⁴ = 83779393601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83779393517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7923867 + ... + 7934432.

It is an arithmetic number, because the mean of its divisors is an integer number (10101737100).

Almost surely, 2^83779393617 is an apocalyptic number.

It is an amenable number.

83779393617 is a deficient number, since it is larger than the sum of its proper divisors (37441451583).

83779393617 is a wasteful number, since it uses less digits than its factorization.

83779393617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15858892 (or 15858889 counting only the distinct ones).

The product of its digits is 36006768, while the sum is 63.

The spelling of 83779393617 in words is "eighty-three billion, seven hundred seventy-nine million, three hundred ninety-three thousand, six hundred seventeen".