161006560722 has 162 divisors, whose sum is σ = 414607308453. Its totient is φ = 45024704928.

The previous prime is 161006560721. The next prime is 161006560739. The reversal of 161006560722 is 227065600161.

It is a happy number.

161006560722 is a `hidden beast` number, since 16 + 10 + 0 + 6 + 5 + 607 + 22 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 121214689281 + 39791871441 = 348159^2 + 199479^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=283731.

It is a super-2 number, since 2×161006560722² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161006560721) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 703085304 + ... + 703085532.

Almost surely, 2^161006560722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161006560722

161006560722 is an abundant number, since it is smaller than the sum of its proper divisors (253600747731).

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

161006560722 is an equidigital number, since it uses as much as digits as its factorization.

161006560722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 161006560722 in words is "one hundred sixty-one billion, six million, five hundred sixty thousand, seven hundred twenty-two".