5445236561 has 6 divisors (see below), whose sum is σ = 5784386550. Its totient is φ = 5124928256.

The previous prime is 5445236557. The next prime is 5445236579. The reversal of 5445236561 is 1656325445.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3570779536 + 1874457025 = 59756^2 + 43295^2 .

It is not a de Polignac number, because 5445236561 - 2² = 5445236557 is a prime.

It is a super-2 number, since 2×5445236561² = 59301202410502213442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5445236551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9420536 + ... + 9421113.

It is an arithmetic number, because the mean of its divisors is an integer number (964064425).

Almost surely, 2^5445236561 is an apocalyptic number.

It is an amenable number.

5445236561 is a deficient number, since it is larger than the sum of its proper divisors (339149989).

5445236561 is a wasteful number, since it uses less digits than its factorization.

5445236561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18841683 (or 18841666 counting only the distinct ones).

The product of its digits is 432000, while the sum is 41.

The square root of 5445236561 is about 73791.8461688011. The cubic root of 5445236561 is about 1759.2960081522.

The spelling of 5445236561 in words is "five billion, four hundred forty-five million, two hundred thirty-six thousand, five hundred sixty-one".