779573272128 has 112 divisors (see below), whose sum is σ = 2357953916544. Its totient is φ = 222671646720.

The previous prime is 779573272109. The next prime is 779573272133. The reversal of 779573272128 is 821272375977.

It is a tau number, because it is divible by the number of its divisors (112).

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4731876 + ... + 4893852.

Almost surely, 2^779573272128 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 779573272128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1178976958272).

779573272128 is an abundant number, since it is smaller than the sum of its proper divisors (1578380644416).

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

779573272128 is a wasteful number, since it uses less digits than its factorization.

779573272128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165580 (or 165570 counting only the distinct ones).

The product of its digits is 20744640, while the sum is 60.

The spelling of 779573272128 in words is "seven hundred seventy-nine billion, five hundred seventy-three million, two hundred seventy-two thousand, one hundred twenty-eight".