77996369786 has 24 divisors (see below), whose sum is σ = 123659409780. Its totient is φ = 36890845056.

The previous prime is 77996369779. The next prime is 77996369791. The reversal of 77996369786 is 68796369977.

It can be written as a sum of positive squares in 2 ways, for example, as 59618500561 + 18377869225 = 244169^2 + 135565^2 .

It is a Smith number, since the sum of its digits (77) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 409010 + ... + 568578.

Almost surely, 2^77996369786 is an apocalyptic number.

77996369786 is a deficient number, since it is larger than the sum of its proper divisors (45663039994).

77996369786 is a wasteful number, since it uses less digits than its factorization.

77996369786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160286 (or 160267 counting only the distinct ones).

The product of its digits is 1296243648, while the sum is 77.

The spelling of 77996369786 in words is "seventy-seven billion, nine hundred ninety-six million, three hundred sixty-nine thousand, seven hundred eighty-six".