161600665101090 has 32 divisors (see below), whose sum is σ = 390311924892480. Its totient is φ = 42819029732544.

The previous prime is 161600665100869. The next prime is 161600665101091. The reversal of 161600665101090 is 90101566006161.

It is a super-2 number, since 2×161600665101090² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161600665101091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17155055280 + ... + 17155064699.

It is an arithmetic number, because the mean of its divisors is an integer number (12197247652890).

Almost surely, 2^{161600665101090} is an apocalyptic number.

161600665101090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161600665101090 is an abundant number, since it is smaller than the sum of its proper divisors (228711259791390).

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

161600665101090 is a wasteful number, since it uses less digits than its factorization.

161600665101090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34310120146.

The product of its (nonzero) digits is 58320, while the sum is 42.

The spelling of 161600665101090 in words is "one hundred sixty-one trillion, six hundred billion, six hundred sixty-five million, one hundred one thousand, ninety".