165120426225493 has 4 divisors (see below), whose sum is σ = 165120959097900. Its totient is φ = 165119893353088.

The previous prime is 165120426225481. The next prime is 165120426225551. The reversal of 165120426225493 is 394522624021561.

It is a happy number.

165120426225493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 85424508681444 + 79695917544049 = 9242538^2 + 8927257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165120426225493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165120426225493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165120426255493) 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, 265971130 + ... + 266591227.

It is an arithmetic number, because the mean of its divisors is an integer number (41280239774475).

Almost surely, 2^{165120426225493} is an apocalyptic number.

It is an amenable number.

165120426225493 is a deficient number, since it is larger than the sum of its proper divisors (532872407).

165120426225493 is an equidigital number, since it uses as much as digits as its factorization.

165120426225493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532872406.

The product of its (nonzero) digits is 6220800, while the sum is 52.

The spelling of 165120426225493 in words is "one hundred sixty-five trillion, one hundred twenty billion, four hundred twenty-six million, two hundred twenty-five thousand, four hundred ninety-three".