78328904180 has 24 divisors (see below), whose sum is σ = 164551088520. Its totient is φ = 31320058880.

The previous prime is 78328904123. The next prime is 78328904197. The reversal of 78328904180 is 8140982387.

It can be written as a sum of positive squares in 4 ways, for example, as 11794828816 + 66534075364 = 108604^2 + 257942^2 .

It is a super-2 number, since 2×78328904180² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 662981 + ... + 772140.

It is an arithmetic number, because the mean of its divisors is an integer number (6856295355).

Almost surely, 2^78328904180 is an apocalyptic number.

It is an amenable number.

78328904180 is an abundant number, since it is smaller than the sum of its proper divisors (86222184340).

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

78328904180 is a wasteful number, since it uses less digits than its factorization.

78328904180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437859 (or 1437857 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 78328904180 in words is "seventy-eight billion, three hundred twenty-eight million, nine hundred four thousand, one hundred eighty".