84887656722 has 90 divisors (see below), whose sum is σ = 209175671397. Its totient is φ = 25711171200.

The previous prime is 84887656697. The next prime is 84887656757. The reversal of 84887656722 is 22765678848.

84887656722 is a `hidden beast` number, since 8 + 48 + 8 + 7 + 6 + 567 + 22 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 83624494041 + 1263162681 = 289179^2 + 35541^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=206019.

It is a super-2 number, since 2×84887656722² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 84887656722.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 40790722 + ... + 40792802.

Almost surely, 2^84887656722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84887656722

84887656722 is an abundant number, since it is smaller than the sum of its proper divisors (124288014675).

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

84887656722 is an equidigital number, since it uses as much as digits as its factorization.

84887656722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4198 (or 2097 counting only the distinct ones).

The product of its digits is 72253440, while the sum is 63.

The spelling of 84887656722 in words is "eighty-four billion, eight hundred eighty-seven million, six hundred fifty-six thousand, seven hundred twenty-two".