161611101516166 has 8 divisors (see below), whose sum is σ = 242438454326880. Its totient is φ = 80798283407208.

The previous prime is 161611101516149. The next prime is 161611101516187. The reversal of 161611101516166 is 661615101116161.

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

It is a super-2 number, since 2×161611101516166² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3633647641 + ... + 3633692116.

It is an arithmetic number, because the mean of its divisors is an integer number (30304806790860).

Almost surely, 2^{161611101516166} is an apocalyptic number.

161611101516166 is a deficient number, since it is larger than the sum of its proper divisors (80827352810714).

161611101516166 is a wasteful number, since it uses less digits than its factorization.

161611101516166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7267350878.

The product of its (nonzero) digits is 38880, while the sum is 43.

The spelling of 161611101516166 in words is "one hundred sixty-one trillion, six hundred eleven billion, one hundred one million, five hundred sixteen thousand, one hundred sixty-six".