161051622159 has 4 divisors (see below), whose sum is σ = 214735496216. Its totient is φ = 107367748104.

The previous prime is 161051622139. The next prime is 161051622181. The reversal of 161051622159 is 951226150161.

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

It is not a de Polignac number, because 161051622159 - 2²⁸ = 160783186703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161051622139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26841937024 + ... + 26841937029.

It is an arithmetic number, because the mean of its divisors is an integer number (53683874054).

Almost surely, 2^161051622159 is an apocalyptic number.

161051622159 is a deficient number, since it is larger than the sum of its proper divisors (53683874057).

161051622159 is an equidigital number, since it uses as much as digits as its factorization.

161051622159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53683874056.

The product of its (nonzero) digits is 32400, while the sum is 39.

The spelling of 161051622159 in words is "one hundred sixty-one billion, fifty-one million, six hundred twenty-two thousand, one hundred fifty-nine".