161122223566 has 8 divisors (see below), whose sum is σ = 243033522120. Its totient is φ = 80111049528.

The previous prime is 161122223519. The next prime is 161122223579. The reversal of 161122223566 is 665322221161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225030681 + ... + 225031396.

It is an arithmetic number, because the mean of its divisors is an integer number (30379190265).

Almost surely, 2^161122223566 is an apocalyptic number.

161122223566 is a deficient number, since it is larger than the sum of its proper divisors (81911298554).

161122223566 is a wasteful number, since it uses less digits than its factorization.

161122223566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450062258.

The product of its digits is 51840, while the sum is 37.

The spelling of 161122223566 in words is "one hundred sixty-one billion, one hundred twenty-two million, two hundred twenty-three thousand, five hundred sixty-six".