779077884648 has 128 divisors (see below), whose sum is σ = 2345484441600. Its totient is φ = 210662850816.

The previous prime is 779077884601. The next prime is 779077884659. The reversal of 779077884648 is 846488770977.

It is a self number, because there is not a number n which added to its sum of digits gives 779077884648.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 3013590 + ... + 3261882.

It is an arithmetic number, because the mean of its divisors is an integer number (18324097200).

Almost surely, 2^779077884648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 779077884648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1172742220800).

779077884648 is an abundant number, since it is smaller than the sum of its proper divisors (1566406556952).

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

779077884648 is a wasteful number, since it uses less digits than its factorization.

779077884648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249311 (or 249307 counting only the distinct ones).

The product of its (nonzero) digits is 1062125568, while the sum is 75.

The spelling of 779077884648 in words is "seven hundred seventy-nine billion, seventy-seven million, eight hundred eighty-four thousand, six hundred forty-eight".