165561006065015 has 16 divisors (see below), whose sum is σ = 216734878452096. Its totient is φ = 120407743015200.

The previous prime is 165561006064999. The next prime is 165561006065069. The reversal of 165561006065015 is 510560600165561.

It is not a de Polignac number, because 165561006065015 - 2⁴ = 165561006064999 is a prime.

It is a super-2 number, since 2×165561006065015² (a number of 29 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 24409904 + ... + 30446106.

It is an arithmetic number, because the mean of its divisors is an integer number (13545929903256).

Almost surely, 2^{165561006065015} is an apocalyptic number.

165561006065015 is a deficient number, since it is larger than the sum of its proper divisors (51173872387081).

165561006065015 is a wasteful number, since it uses less digits than its factorization.

165561006065015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6534910.

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 165561006065015 in words is "one hundred sixty-five trillion, five hundred sixty-one billion, six million, sixty-five thousand, fifteen".