161122705576 has 32 divisors (see below), whose sum is σ = 345652295040. Its totient is φ = 68974717248.

The previous prime is 161122705573. The next prime is 161122705607. The reversal of 161122705576 is 675507221161.

It is not an unprimeable number, because it can be changed into a prime (161122705571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1572195 + ... + 1671538.

It is an arithmetic number, because the mean of its divisors is an integer number (10801634220).

Almost surely, 2^161122705576 is an apocalyptic number.

It is an amenable number.

161122705576 is an abundant number, since it is smaller than the sum of its proper divisors (184529589464).

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

161122705576 is a wasteful number, since it uses less digits than its factorization.

161122705576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3244633 (or 3244629 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 43.

The spelling of 161122705576 in words is "one hundred sixty-one billion, one hundred twenty-two million, seven hundred five thousand, five hundred seventy-six".