165537627373 has 4 divisors (see below), whose sum is σ = 170011617340. Its totient is φ = 161063637408.

The previous prime is 165537627371. The next prime is 165537627379. The reversal of 165537627373 is 373726735561.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 95544046404 + 69993580969 = 309102^2 + 264563^2 .

It is a cyclic number.

It is not a de Polignac number, because 165537627373 - 2¹ = 165537627371 is a prime.

It is a super-2 number, since 2×165537627373² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165537627371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2236994928 + ... + 2236995001.

It is an arithmetic number, because the mean of its divisors is an integer number (42502904335).

Almost surely, 2^165537627373 is an apocalyptic number.

It is an amenable number.

165537627373 is a deficient number, since it is larger than the sum of its proper divisors (4473989967).

165537627373 is an equidigital number, since it uses as much as digits as its factorization.

165537627373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4473989966.

The product of its digits is 16669800, while the sum is 55.

The spelling of 165537627373 in words is "one hundred sixty-five billion, five hundred thirty-seven million, six hundred twenty-seven thousand, three hundred seventy-three".