161216051166 has 16 divisors (see below), whose sum is σ = 358257891600. Its totient is φ = 53738683704.

The previous prime is 161216051141. The next prime is 161216051177. The reversal of 161216051166 is 661150612161.

161216051166 is a `hidden beast` number, since 1 + 6 + 1 + 21 + 60 + 511 + 66 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 161216051166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1492741161 + ... + 1492741268.

It is an arithmetic number, because the mean of its divisors is an integer number (22391118225).

Almost surely, 2^161216051166 is an apocalyptic number.

161216051166 is an abundant number, since it is smaller than the sum of its proper divisors (197041840434).

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

161216051166 is a wasteful number, since it uses less digits than its factorization.

161216051166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2985482440 (or 2985482434 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 161216051166 in words is "one hundred sixty-one billion, two hundred sixteen million, fifty-one thousand, one hundred sixty-six".