161611101566016 has 56 divisors (see below), whose sum is σ = 427698903360960. Its totient is φ = 53857407969792.

The previous prime is 161611101566011. The next prime is 161611101566051. The reversal of 161611101566016 is 610665101116161.

It is a super-2 number, since 2×161611101566016² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161611101566011) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 100443676 + ... + 102039963.

It is an arithmetic number, because the mean of its divisors is an integer number (7637480417160).

Almost surely, 2^{161611101566016} is an apocalyptic number.

161611101566016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161611101566016 is an abundant number, since it is smaller than the sum of its proper divisors (266087801794944).

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

161611101566016 is a wasteful number, since it uses less digits than its factorization.

161611101566016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202487811 (or 202487801 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 42.

The spelling of 161611101566016 in words is "one hundred sixty-one trillion, six hundred eleven billion, one hundred one million, five hundred sixty-six thousand, sixteen".