778797797877 has 72 divisors (see below), whose sum is σ = 1303501399200. Its totient is φ = 446493833280.

The previous prime is 778797797861. The next prime is 778797797893.

778797797877 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (778797797861) and next prime (778797797893).

It is not a de Polignac number, because 778797797877 - 2⁴ = 778797797861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778797797177) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 14104399 + ... + 14159507.

It is an arithmetic number, because the mean of its divisors is an integer number (18104186100).

Almost surely, 2^778797797877 is an apocalyptic number.

It is an amenable number.

778797797877 is a deficient number, since it is larger than the sum of its proper divisors (524703601323).

778797797877 is a wasteful number, since it uses less digits than its factorization.

778797797877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55839 (or 55825 counting only the distinct ones).

The product of its digits is 29884728384, while the sum is 90.

The spelling of 778797797877 in words is "seven hundred seventy-eight billion, seven hundred ninety-seven million, seven hundred ninety-seven thousand, eight hundred seventy-seven".