779405552856 has 80 divisors (see below), whose sum is σ = 2494922551440. Its totient is φ = 222687299520.

The previous prime is 779405552839. The next prime is 779405552881. The reversal of 779405552856 is 658255504977.

779405552856 is a `hidden beast` number, since 7 + 7 + 9 + 4 + 0 + 55 + 528 + 56 = 666.

779405552856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 779405552793 and 779405552802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 85908775 + ... + 85917846.

It is an arithmetic number, because the mean of its divisors is an integer number (31186531893).

Almost surely, 2^779405552856 is an apocalyptic number.

It is an amenable number.

779405552856 is an abundant number, since it is smaller than the sum of its proper divisors (1715516998584).

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

779405552856 is a wasteful number, since it uses less digits than its factorization.

779405552856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171826646 (or 171826633 counting only the distinct ones).

The product of its (nonzero) digits is 105840000, while the sum is 63.

The spelling of 779405552856 in words is "seven hundred seventy-nine billion, four hundred five million, five hundred fifty-two thousand, eight hundred fifty-six".