779538874561 has 8 divisors (see below), whose sum is σ = 820867975200. Its totient is φ = 738239847840.

The previous prime is 779538874519. The next prime is 779538874577. The reversal of 779538874561 is 165478835977.

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

It is a cyclic number.

It is not a de Polignac number, because 779538874561 - 2¹¹ = 779538872513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (779538874511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7465255 + ... + 7568956.

It is an arithmetic number, because the mean of its divisors is an integer number (102608496900).

Almost surely, 2^779538874561 is an apocalyptic number.

It is an amenable number.

779538874561 is a deficient number, since it is larger than the sum of its proper divisors (41329100639).

779538874561 is a wasteful number, since it uses less digits than its factorization.

779538874561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15036959.

The product of its digits is 355622400, while the sum is 70.

The spelling of 779538874561 in words is "seven hundred seventy-nine billion, five hundred thirty-eight million, eight hundred seventy-four thousand, five hundred sixty-one".