77699839612 has 12 divisors (see below), whose sum is σ = 135981750240. Its totient is φ = 38847910976.

The previous prime is 77699839589. The next prime is 77699839621. The reversal of 77699839612 is 21693899677.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 413437 + ... + 571252.

It is an arithmetic number, because the mean of its divisors is an integer number (11331812520).

Almost surely, 2^77699839612 is an apocalyptic number.

It is an amenable number.

77699839612 is a deficient number, since it is larger than the sum of its proper divisors (58281910628).

77699839612 is a wasteful number, since it uses less digits than its factorization.

77699839612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004420 (or 1004418 counting only the distinct ones).

The product of its digits is 61725888, while the sum is 67.

The spelling of 77699839612 in words is "seventy-seven billion, six hundred ninety-nine million, eight hundred thirty-nine thousand, six hundred twelve".