77979960344071 has 4 divisors (see below), whose sum is σ = 77987890788192. Its totient is φ = 77972029899952.

The previous prime is 77979960344063. The next prime is 77979960344137. The reversal of 77979960344071 is 17044306997977.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77979960344071 - 2³ = 77979960344063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77979960343985 and 77979960344003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77979960342071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3965207311 + ... + 3965226976.

It is an arithmetic number, because the mean of its divisors is an integer number (19496972697048).

Almost surely, 2^{77979960344071} is an apocalyptic number.

77979960344071 is a deficient number, since it is larger than the sum of its proper divisors (7930444121).

77979960344071 is an equidigital number, since it uses as much as digits as its factorization.

77979960344071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7930444120.

The product of its (nonzero) digits is 504094752, while the sum is 73.

The spelling of 77979960344071 in words is "seventy-seven trillion, nine hundred seventy-nine billion, nine hundred sixty million, three hundred forty-four thousand, seventy-one".