76789616391 has 6 divisors (see below), whose sum is σ = 110918334800. Its totient is φ = 51193077588.

The previous prime is 76789616357. The next prime is 76789616399. The reversal of 76789616391 is 19361698767.

76789616391 is a `hidden beast` number, since 7 + 6 + 7 + 8 + 9 + 616 + 3 + 9 + 1 = 666.

It is not a de Polignac number, because 76789616391 - 2¹⁵ = 76789583623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76789616399) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4266089791 + ... + 4266089808.

Almost surely, 2^76789616391 is an apocalyptic number.

76789616391 is a deficient number, since it is larger than the sum of its proper divisors (34128718409).

76789616391 is a wasteful number, since it uses less digits than its factorization.

76789616391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8532179605 (or 8532179602 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 63.

The spelling of 76789616391 in words is "seventy-six billion, seven hundred eighty-nine million, six hundred sixteen thousand, three hundred ninety-one".