165022534881 has 12 divisors (see below), whose sum is σ = 238369430052. Its totient is φ = 110013386496.

The previous prime is 165022534829. The next prime is 165022534889. The reversal of 165022534881 is 188435220561.

165022534881 is a `hidden beast` number, since 1 + 6 + 5 + 0 + 225 + 348 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 114595790400 + 50426744481 = 338520^2 + 224559^2 .

It is not a de Polignac number, because 165022534881 - 2¹⁴ = 165022518497 is a prime.

It is a super-2 number, since 2×165022534881² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165022534889) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1003765 + ... + 1156541.

It is an arithmetic number, because the mean of its divisors is an integer number (19864119171).

Almost surely, 2^165022534881 is an apocalyptic number.

It is an amenable number.

165022534881 is a deficient number, since it is larger than the sum of its proper divisors (73346895171).

165022534881 is a wasteful number, since it uses less digits than its factorization.

165022534881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272800 (or 272797 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The spelling of 165022534881 in words is "one hundred sixty-five billion, twenty-two million, five hundred thirty-four thousand, eight hundred eighty-one".