78215819996180 has 24 divisors (see below), whose sum is σ = 164253393478440. Its totient is φ = 31286295334400.

The previous prime is 78215819996179. The next prime is 78215819996203. The reversal of 78215819996180 is 8169991851287.

It can be written as a sum of positive squares in 4 ways, for example, as 490543350544 + 77725276645636 = 700388^2 + 8816194^2 .

It is a super-2 number, since 2×78215819996180² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78215819996098 and 78215819996107.

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, 29417816 + ... + 31966224.

It is an arithmetic number, because the mean of its divisors is an integer number (6843891394935).

Almost surely, 2^{78215819996180} is an apocalyptic number.

It is an amenable number.

78215819996180 is an abundant number, since it is smaller than the sum of its proper divisors (86037573482260).

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

78215819996180 is a wasteful number, since it uses less digits than its factorization.

78215819996180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4083019 (or 4083017 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 74.

The spelling of 78215819996180 in words is "seventy-eight trillion, two hundred fifteen billion, eight hundred nineteen million, nine hundred ninety-six thousand, one hundred eighty".