165663322045031 has 4 divisors (see below), whose sum is σ = 169188073577952. Its totient is φ = 162138570512112.

The previous prime is 165663322045019. The next prime is 165663322045057. The reversal of 165663322045031 is 130540223366561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165663322045031 - 2²⁶ = 165663254936167 is a prime.

It is a super-2 number, since 2×165663322045031² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 3524751532873 = 165663322045031 / (1 + 6 + 5 + 6 + 6 + 3 + 3 + 2 + 2 + 0 + 4 + 5 + 0 + 3 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165663322945031) 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 3 ways as a sum of consecutive naturals, for example, 1762375766390 + ... + 1762375766483.

It is an arithmetic number, because the mean of its divisors is an integer number (42297018394488).

Almost surely, 2^{165663322045031} is an apocalyptic number.

165663322045031 is a deficient number, since it is larger than the sum of its proper divisors (3524751532921).

165663322045031 is an equidigital number, since it uses as much as digits as its factorization.

165663322045031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3524751532920.

The product of its (nonzero) digits is 2332800, while the sum is 47.

The spelling of 165663322045031 in words is "one hundred sixty-five trillion, six hundred sixty-three billion, three hundred twenty-two million, forty-five thousand, thirty-one".