165321612063003 has 16 divisors (see below), whose sum is σ = 244056870999936. Its totient is φ = 98699469887040.

The previous prime is 165321612062977. The next prime is 165321612063043. The reversal of 165321612063003 is 300360216123561.

It is not a de Polignac number, because 165321612063003 - 2⁹ = 165321612062491 is a prime.

It is a super-2 number, since 2×165321612063003² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165321612063043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37386160626 + ... + 37386165047.

It is an arithmetic number, because the mean of its divisors is an integer number (15253554437496).

Almost surely, 2^{165321612063003} is an apocalyptic number.

165321612063003 is a deficient number, since it is larger than the sum of its proper divisors (78735258936933).

165321612063003 is a wasteful number, since it uses less digits than its factorization.

165321612063003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74772325754.

The product of its (nonzero) digits is 116640, while the sum is 39.

Adding to 165321612063003 its reverse (300360216123561), we get a palindrome (465681828186564).

The spelling of 165321612063003 in words is "one hundred sixty-five trillion, three hundred twenty-one billion, six hundred twelve million, sixty-three thousand, three".