161161551110111 has 8 divisors (see below), whose sum is σ = 165381449080848. Its totient is φ = 156955421160000.

The previous prime is 161161551110071. The next prime is 161161551110117. The reversal of 161161551110111 is 111011155161161.

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

It is a cyclic number.

It is not a de Polignac number, because 161161551110111 - 2⁶ = 161161551110047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161161551110117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3441981440 + ... + 3442028261.

It is an arithmetic number, because the mean of its divisors is an integer number (20672681135106).

Almost surely, 2^{161161551110111} is an apocalyptic number.

161161551110111 is a deficient number, since it is larger than the sum of its proper divisors (4219897970737).

161161551110111 is an equidigital number, since it uses as much as digits as its factorization.

161161551110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6884010313.

The product of its (nonzero) digits is 900, while the sum is 32.

The spelling of 161161551110111 in words is "one hundred sixty-one trillion, one hundred sixty-one billion, five hundred fifty-one million, one hundred ten thousand, one hundred eleven".