161122223567 has 4 divisors (see below), whose sum is σ = 165476878296. Its totient is φ = 156767568840.

The previous prime is 161122223519. The next prime is 161122223579. The reversal of 161122223567 is 765322221161.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-161122223567 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161122223567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161122225567) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2177327309 + ... + 2177327382.

It is an arithmetic number, because the mean of its divisors is an integer number (41369219574).

Almost surely, 2^161122223567 is an apocalyptic number.

161122223567 is a deficient number, since it is larger than the sum of its proper divisors (4354654729).

161122223567 is an equidigital number, since it uses as much as digits as its factorization.

161122223567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4354654728.

The product of its digits is 60480, while the sum is 38.

The spelling of 161122223567 in words is "one hundred sixty-one billion, one hundred twenty-two million, two hundred twenty-three thousand, five hundred sixty-seven".