79338675780 has 648 divisors, whose sum is σ = 305979291072. Its totient is φ = 16291072512.

The previous prime is 79338675749. The next prime is 79338675781. The reversal of 79338675780 is 8757683397.

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

It is not an unprimeable number, because it can be changed into a prime (79338675781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 955887619 + ... + 955887701.

It is an arithmetic number, because the mean of its divisors is an integer number (472190264).

Almost surely, 2^79338675780 is an apocalyptic number.

79338675780 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79338675780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152989645536).

79338675780 is an abundant number, since it is smaller than the sum of its proper divisors (226640615292).

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

79338675780 is a wasteful number, since it uses less digits than its factorization.

79338675780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 53343360, while the sum is 63.

The spelling of 79338675780 in words is "seventy-nine billion, three hundred thirty-eight million, six hundred seventy-five thousand, seven hundred eighty".