77986216897713 has 16 divisors (see below), whose sum is σ = 116656836499840. Its totient is φ = 51486046105392.

The previous prime is 77986216897709. The next prime is 77986216897741. The reversal of 77986216897713 is 31779861268977.

It is not a de Polignac number, because 77986216897713 - 2² = 77986216897709 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77986216827713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14021251606 + ... + 14021257167.

It is an arithmetic number, because the mean of its divisors is an integer number (7291052281240).

Almost surely, 2^{77986216897713} is an apocalyptic number.

It is an amenable number.

77986216897713 is a deficient number, since it is larger than the sum of its proper divisors (38670619602127).

77986216897713 is a wasteful number, since it uses less digits than its factorization.

77986216897713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28042508885 (or 28042508879 counting only the distinct ones).

The product of its digits is 2688505344, while the sum is 81.

The spelling of 77986216897713 in words is "seventy-seven trillion, nine hundred eighty-six billion, two hundred sixteen million, eight hundred ninety-seven thousand, seven hundred thirteen".