165881134288 has 40 divisors (see below), whose sum is σ = 322600055400. Its totient is φ = 82629702144.

The previous prime is 165881134273. The next prime is 165881134297. The reversal of 165881134288 is 882431188561.

165881134288 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 68304867904 + 97576266384 = 261352^2 + 312372^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27510858 + ... + 27516886.

It is an arithmetic number, because the mean of its divisors is an integer number (8065001385).

Almost surely, 2^165881134288 is an apocalyptic number.

It is an amenable number.

165881134288 is a deficient number, since it is larger than the sum of its proper divisors (156718921112).

165881134288 is a wasteful number, since it uses less digits than its factorization.

165881134288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12199 (or 12193 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 55.

The spelling of 165881134288 in words is "one hundred sixty-five billion, eight hundred eighty-one million, one hundred thirty-four thousand, two hundred eighty-eight".