161611101566059 has 4 divisors (see below), whose sum is σ = 161637375527920. Its totient is φ = 161584827604200.

The previous prime is 161611101566051. The next prime is 161611101566087. The reversal of 161611101566059 is 950665101116161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161611101566059 - 2³ = 161611101566051 is a prime.

It is a super-2 number, since 2×161611101566059² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161611101566051) 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 3 ways as a sum of consecutive naturals, for example, 13136971704 + ... + 13136984005.

It is an arithmetic number, because the mean of its divisors is an integer number (40409343881980).

Almost surely, 2^{161611101566059} is an apocalyptic number.

161611101566059 is a deficient number, since it is larger than the sum of its proper divisors (26273961861).

161611101566059 is an equidigital number, since it uses as much as digits as its factorization.

161611101566059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26273961860.

The product of its (nonzero) digits is 291600, while the sum is 49.

The spelling of 161611101566059 in words is "one hundred sixty-one trillion, six hundred eleven billion, one hundred one million, five hundred sixty-six thousand, fifty-nine".