165241400917 has 4 divisors (see below), whose sum is σ = 165242245356. Its totient is φ = 165240556480.

The previous prime is 165241400881. The next prime is 165241401019. The reversal of 165241400917 is 719004142561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 719004142561 = 239753 ⋅2998937.

It can be written as a sum of positive squares in 2 ways, for example, as 26101956721 + 139139444196 = 161561^2 + 373014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165241400917 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 165241400917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165241400017) 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, 39903 + ... + 576259.

It is an arithmetic number, because the mean of its divisors is an integer number (41310561339).

Almost surely, 2^165241400917 is an apocalyptic number.

It is an amenable number.

165241400917 is a deficient number, since it is larger than the sum of its proper divisors (844439).

165241400917 is an equidigital number, since it uses as much as digits as its factorization.

165241400917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844438.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 165241400917 in words is "one hundred sixty-five billion, two hundred forty-one million, four hundred thousand, nine hundred seventeen".