83779393616 has 20 divisors (see below), whose sum is σ = 162359965812. Its totient is φ = 41880047616.

The previous prime is 83779393601. The next prime is 83779393717. The reversal of 83779393616 is 61639397738.

It can be written as a sum of positive squares in 2 ways, for example, as 78153793600 + 5625600016 = 279560^2 + 75004^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531185 + ... + 670608.

Almost surely, 2^83779393616 is an apocalyptic number.

It is an amenable number.

83779393616 is a deficient number, since it is larger than the sum of its proper divisors (78580572196).

83779393616 is a wasteful number, since it uses less digits than its factorization.

83779393616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206158 (or 1206152 counting only the distinct ones).

The product of its digits is 30862944, while the sum is 62.

The spelling of 83779393616 in words is "eighty-three billion, seven hundred seventy-nine million, three hundred ninety-three thousand, six hundred sixteen".