165937885753 has 4 divisors (see below), whose sum is σ = 166112008308. Its totient is φ = 165763763200.

The previous prime is 165937885739. The next prime is 165937885759. The reversal of 165937885753 is 357588739561.

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 64735642624 + 101202243129 = 254432^2 + 318123^2 .

It is a cyclic number.

It is not a de Polignac number, because 165937885753 - 2¹³ = 165937877561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165937885759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87059848 + ... + 87061753.

It is an arithmetic number, because the mean of its divisors is an integer number (41528002077).

Almost surely, 2^165937885753 is an apocalyptic number.

It is an amenable number.

165937885753 is a deficient number, since it is larger than the sum of its proper divisors (174122555).

165937885753 is an equidigital number, since it uses as much as digits as its factorization.

165937885753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174122554.

The product of its digits is 190512000, while the sum is 67.

The spelling of 165937885753 in words is "one hundred sixty-five billion, nine hundred thirty-seven million, eight hundred eighty-five thousand, seven hundred fifty-three".