5644945989497 has 4 divisors (see below), whose sum is σ = 5977001635956. Its totient is φ = 5312890343040.

The previous prime is 5644945989479. The next prime is 5644945989503. The reversal of 5644945989497 is 7949895494465.

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 2869869776761 + 2775076212736 = 1694069^2 + 1665856^2 .

It is a cyclic number.

It is not a de Polignac number, because 5644945989497 - 2¹⁴ = 5644945973113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5644945989437) 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 3 ways as a sum of consecutive naturals, for example, 166027823204 + ... + 166027823237.

It is an arithmetic number, because the mean of its divisors is an integer number (1494250408989).

Almost surely, 2^{5644945989497} is an apocalyptic number.

It is an amenable number.

5644945989497 is a deficient number, since it is larger than the sum of its proper divisors (332055646459).

5644945989497 is a wasteful number, since it uses less digits than its factorization.

5644945989497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332055646458.

The product of its digits is 14108774400, while the sum is 83.

The spelling of 5644945989497 in words is "five trillion, six hundred forty-four billion, nine hundred forty-five million, nine hundred eighty-nine thousand, four hundred ninety-seven".