161550165061166 has 128 divisors (see below), whose sum is σ = 284985873559296. Its totient is φ = 67263613747200.

The previous prime is 161550165061157. The next prime is 161550165061211. The reversal of 161550165061166 is 661160561055161.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9558607316 + ... + 9558624216.

It is an arithmetic number, because the mean of its divisors is an integer number (2226452137182).

Almost surely, 2^{161550165061166} is an apocalyptic number.

161550165061166 is a deficient number, since it is larger than the sum of its proper divisors (123435708498130).

161550165061166 is a wasteful number, since it uses less digits than its factorization.

161550165061166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17646.

The product of its (nonzero) digits is 972000, while the sum is 50.

The spelling of 161550165061166 in words is "one hundred sixty-one trillion, five hundred fifty billion, one hundred sixty-five million, sixty-one thousand, one hundred sixty-six".