165111007085 has 4 divisors (see below), whose sum is σ = 198133208508. Its totient is φ = 132088805664.

The previous prime is 165111007079. The next prime is 165111007163. The reversal of 165111007085 is 580700111561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 580700111561 = 206039 ⋅2818399.

It can be written as a sum of positive squares in 2 ways, for example, as 26424778249 + 138686228836 = 162557^2 + 372406^2 .

It is a cyclic number.

It is not a de Polignac number, because 165111007085 - 2⁶ = 165111007021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16511100704 + ... + 16511100713.

It is an arithmetic number, because the mean of its divisors is an integer number (49533302127).

Almost surely, 2^165111007085 is an apocalyptic number.

It is an amenable number.

165111007085 is a deficient number, since it is larger than the sum of its proper divisors (33022201423).

165111007085 is an equidigital number, since it uses as much as digits as its factorization.

165111007085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33022201422.

The product of its (nonzero) digits is 8400, while the sum is 35.

The spelling of 165111007085 in words is "one hundred sixty-five billion, one hundred eleven million, seven thousand, eighty-five".