779281678344 has 128 divisors (see below), whose sum is σ = 2210824022400. Its totient is φ = 226919024640.

The previous prime is 779281678339. The next prime is 779281678349. The reversal of 779281678344 is 443876182977.

It is an interprime number because it is at equal distance from previous prime (779281678339) and next prime (779281678349).

It is not an unprimeable number, because it can be changed into a prime (779281678349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5580414 + ... + 5718354.

It is an arithmetic number, because the mean of its divisors is an integer number (17272062675).

Almost surely, 2^779281678344 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 779281678344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1105412011200).

779281678344 is an abundant number, since it is smaller than the sum of its proper divisors (1431542344056).

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

779281678344 is a wasteful number, since it uses less digits than its factorization.

779281678344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138935 (or 138931 counting only the distinct ones).

The product of its digits is 113799168, while the sum is 66.

The spelling of 779281678344 in words is "seven hundred seventy-nine billion, two hundred eighty-one million, six hundred seventy-eight thousand, three hundred forty-four".