82778188722 has 16 divisors (see below), whose sum is σ = 167888158272. Its totient is φ = 27204099440.

The previous prime is 82778188693. The next prime is 82778188783. The reversal of 82778188722 is 22788187728.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 97157073 + ... + 97157924.

It is an arithmetic number, because the mean of its divisors is an integer number (10493009892).

Almost surely, 2^82778188722 is an apocalyptic number.

82778188722 is an abundant number, since it is smaller than the sum of its proper divisors (85109969550).

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

82778188722 is a wasteful number, since it uses less digits than its factorization.

82778188722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194315073.

The product of its digits is 11239424, while the sum is 60.

The spelling of 82778188722 in words is "eighty-two billion, seven hundred seventy-eight million, one hundred eighty-eight thousand, seven hundred twenty-two".