77315696639 has 8 divisors (see below), whose sum is σ = 77431176480. Its totient is φ = 77200274016.

The previous prime is 77315696617. The next prime is 77315696641. The reversal of 77315696639 is 93669651377.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77315696639 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 (77315696609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3220709 + ... + 3244625.

It is an arithmetic number, because the mean of its divisors is an integer number (9678897060).

Almost surely, 2^77315696639 is an apocalyptic number.

77315696639 is a deficient number, since it is larger than the sum of its proper divisors (115479841).

77315696639 is a wasteful number, since it uses less digits than its factorization.

77315696639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28609.

The product of its digits is 38578680, while the sum is 62.

The spelling of 77315696639 in words is "seventy-seven billion, three hundred fifteen million, six hundred ninety-six thousand, six hundred thirty-nine".