45221773165 has 4 divisors (see below), whose sum is σ = 54266127804. Its totient is φ = 36177418528.

The previous prime is 45221773153. The next prime is 45221773273. The reversal of 45221773165 is 56137712254.

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 30526030089 + 14695743076 = 174717^2 + 121226^2 .

It is a cyclic number.

It is not a de Polignac number, because 45221773165 - 2¹⁵ = 45221740397 is a prime.

It is a super-4 number, since 4×45221773165⁴ (a number of 44 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 4522177312 + ... + 4522177321.

It is an arithmetic number, because the mean of its divisors is an integer number (13566531951).

Almost surely, 2^45221773165 is an apocalyptic number.

It is an amenable number.

45221773165 is a deficient number, since it is larger than the sum of its proper divisors (9044354639).

45221773165 is an equidigital number, since it uses as much as digits as its factorization.

45221773165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9044354638.

The product of its digits is 352800, while the sum is 43.

The spelling of 45221773165 in words is "forty-five billion, two hundred twenty-one million, seven hundred seventy-three thousand, one hundred sixty-five".