779497794977 has 6 divisors (see below), whose sum is σ = 856803361554. Its totient is φ = 708634358960.

The previous prime is 779497794967. The next prime is 779497794979.

779497794977 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 738638832481 + 40858962496 = 859441^2 + 202136^2 .

It is not a de Polignac number, because 779497794977 - 2¹⁶ = 779497729441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (779497794979) 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, 3221065148 + ... + 3221065389.

It is an arithmetic number, because the mean of its divisors is an integer number (142800560259).

Almost surely, 2^779497794977 is an apocalyptic number.

It is an amenable number.

779497794977 is a deficient number, since it is larger than the sum of its proper divisors (77305566577).

779497794977 is a wasteful number, since it uses less digits than its factorization.

779497794977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6442130559 (or 6442130548 counting only the distinct ones).

The product of its digits is 12350321424, while the sum is 86.

The spelling of 779497794977 in words is "seven hundred seventy-nine billion, four hundred ninety-seven million, seven hundred ninety-four thousand, nine hundred seventy-seven".