83778799122 has 30 divisors (see below), whose sum is σ = 187734823749. Its totient is φ = 27925038360.

The previous prime is 83778799061. The next prime is 83778799129. The reversal of 83778799122 is 22199787738.

It can be written as a sum of positive squares in 2 ways, for example, as 64968402321 + 18810396801 = 254889^2 + 137151^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=204669.

It is a self number, because there is not a number n which added to its sum of digits gives 83778799122.

It is not an unprimeable number, because it can be changed into a prime (83778799129) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 3672672 + ... + 3695412.

Almost surely, 2^83778799122 is an apocalyptic number.

83778799122 is an abundant number, since it is smaller than the sum of its proper divisors (103956024627).

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

83778799122 is an frugal number, since it uses more digits than its factorization.

83778799122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45496 (or 22746 counting only the distinct ones).

The product of its digits is 21337344, while the sum is 63.

The spelling of 83778799122 in words is "eighty-three billion, seven hundred seventy-eight million, seven hundred ninety-nine thousand, one hundred twenty-two".