79439803380 has 192 divisors, whose sum is σ = 289342287360. Its totient is φ = 17714764800.

The previous prime is 79439803351. The next prime is 79439803409. The reversal of 79439803380 is 8330893497.

It is an interprime number because it is at equal distance from previous prime (79439803351) and next prime (79439803409).

It is a super-2 number, since 2×79439803380² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 101311 + ... + 411270.

It is an arithmetic number, because the mean of its divisors is an integer number (1506991080).

Almost surely, 2^79439803380 is an apocalyptic number.

79439803380 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 79439803380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144671143680).

79439803380 is an abundant number, since it is smaller than the sum of its proper divisors (209902483980).

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

79439803380 is a wasteful number, since it uses less digits than its factorization.

79439803380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512647 (or 512639 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 79439803380 in words is "seventy-nine billion, four hundred thirty-nine million, eight hundred three thousand, three hundred eighty".