161611101566087 has 2 divisors, whose sum is σ = 161611101566088. Its totient is φ = 161611101566086.

The previous prime is 161611101566051. The next prime is 161611101566119. The reversal of 161611101566087 is 780665101116161.

It is a strong prime.

It is an emirp because it is prime and its reverse (780665101116161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161611101566087 - 2¹⁰ = 161611101565063 is a prime.

It is a super-2 number, since 2×161611101566087² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161611101560087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80805550783043 + 80805550783044.

It is an arithmetic number, because the mean of its divisors is an integer number (80805550783044).

Almost surely, 2^{161611101566087} is an apocalyptic number.

161611101566087 is a deficient number, since it is larger than the sum of its proper divisors (1).

161611101566087 is an equidigital number, since it uses as much as digits as its factorization.

161611101566087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 50.

The spelling of 161611101566087 in words is "one hundred sixty-one trillion, six hundred eleven billion, one hundred one million, five hundred sixty-six thousand, eighty-seven".