779938801128 has 96 divisors (see below), whose sum is σ = 2197569192000. Its totient is φ = 259148792448.

The previous prime is 779938801121. The next prime is 779938801189. The reversal of 779938801128 is 821108839977.

It is not an unprimeable number, because it can be changed into a prime (779938801121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32428 + ... + 1249371.

It is an arithmetic number, because the mean of its divisors is an integer number (22891345750).

Almost surely, 2^779938801128 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 779938801128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1098784596000).

779938801128 is an abundant number, since it is smaller than the sum of its proper divisors (1417630390872).

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

779938801128 is a wasteful number, since it uses less digits than its factorization.

779938801128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282133 (or 1282117 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 63.

The spelling of 779938801128 in words is "seven hundred seventy-nine billion, nine hundred thirty-eight million, eight hundred one thousand, one hundred twenty-eight".