779965506420 has 24 divisors (see below), whose sum is σ = 2183903418144. Its totient is φ = 207990801696.

The previous prime is 779965506409. The next prime is 779965506421. The reversal of 779965506420 is 24605569977.

It is a super-2 number, since 2×779965506420² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60), and also a Moran number because the ratio is a prime number: 12999425107 = 779965506420 / (7 + 7 + 9 + 9 + 6 + 5 + 5 + 0 + 6 + 4 + 2 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (779965506421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6499712494 + ... + 6499712613.

It is an arithmetic number, because the mean of its divisors is an integer number (90995975756).

Almost surely, 2^779965506420 is an apocalyptic number.

It is an amenable number.

779965506420 is an abundant number, since it is smaller than the sum of its proper divisors (1403937911724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

779965506420 is a wasteful number, since it uses less digits than its factorization.

779965506420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12999425119 (or 12999425117 counting only the distinct ones).

The product of its (nonzero) digits is 28576800, while the sum is 60.

The spelling of 779965506420 in words is "seven hundred seventy-nine billion, nine hundred sixty-five million, five hundred six thousand, four hundred twenty".