165120566507156 has 24 divisors (see below), whose sum is σ = 311197733141064. Its totient is φ = 76207294719360.

The previous prime is 165120566507101. The next prime is 165120566507189. The reversal of 165120566507156 is 651705665021561.

It can be written as a sum of positive squares in 4 ways, for example, as 24289323696400 + 140831242810756 = 4928420^2 + 11867234^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43960175 + ... + 47568246.

It is an arithmetic number, because the mean of its divisors is an integer number (12966572214211).

Almost surely, 2^{165120566507156} is an apocalyptic number.

It is an amenable number.

165120566507156 is a deficient number, since it is larger than the sum of its proper divisors (146077166633908).

165120566507156 is a wasteful number, since it uses less digits than its factorization.

165120566507156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91563131 (or 91563129 counting only the distinct ones).

The product of its (nonzero) digits is 11340000, while the sum is 56.

The spelling of 165120566507156 in words is "one hundred sixty-five trillion, one hundred twenty billion, five hundred sixty-six million, five hundred seven thousand, one hundred fifty-six".