84920128722 has 48 divisors (see below), whose sum is σ = 216160334208. Its totient is φ = 23753881440.

The previous prime is 84920128717. The next prime is 84920128739. The reversal of 84920128722 is 22782102948.

It is a happy number.

It is a super-2 number, since 2×84920128722² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16493178 + ... + 16498325.

It is an arithmetic number, because the mean of its divisors is an integer number (4503340296).

Almost surely, 2^84920128722 is an apocalyptic number.

84920128722 is an abundant number, since it is smaller than the sum of its proper divisors (131240205486).

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

84920128722 is a wasteful number, since it uses less digits than its factorization.

84920128722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32991535 (or 32991532 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 84920128722 in words is "eighty-four billion, nine hundred twenty million, one hundred twenty-eight thousand, seven hundred twenty-two".