165214603517 has 4 divisors (see below), whose sum is σ = 165225908700. Its totient is φ = 165203298336.

The previous prime is 165214603487. The next prime is 165214603529. The reversal of 165214603517 is 715306412561.

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 925437241 + 164289166276 = 30421^2 + 405326^2 .

It is a cyclic number.

It is not a de Polignac number, because 165214603517 - 2²² = 165210409213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165214603577) 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, 5630642 + ... + 5659907.

It is an arithmetic number, because the mean of its divisors is an integer number (41306477175).

Almost surely, 2^165214603517 is an apocalyptic number.

It is an amenable number.

165214603517 is a deficient number, since it is larger than the sum of its proper divisors (11305183).

165214603517 is a wasteful number, since it uses less digits than its factorization.

165214603517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11305182.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 165214603517 in words is "one hundred sixty-five billion, two hundred fourteen million, six hundred three thousand, five hundred seventeen".