165615510005 has 16 divisors (see below), whose sum is σ = 222665376384. Its totient is φ = 117192300480.

The previous prime is 165615509989. The next prime is 165615510077. The reversal of 165615510005 is 500015516561.

It is not a de Polignac number, because 165615510005 - 2⁴ = 165615509989 is a prime.

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, 40689737 + ... + 40693806.

It is an arithmetic number, because the mean of its divisors is an integer number (13916586024).

Almost surely, 2^165615510005 is an apocalyptic number.

It is an amenable number.

165615510005 is a deficient number, since it is larger than the sum of its proper divisors (57049866379).

165615510005 is a wasteful number, since it uses less digits than its factorization.

165615510005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81383596.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 165615510005 in words is "one hundred sixty-five billion, six hundred fifteen million, five hundred ten thousand, five".