9444459897857 has 4 divisors (see below), whose sum is σ = 9444768803076. Its totient is φ = 9444150992640.

The previous prime is 9444459897841. The next prime is 9444459897907. The reversal of 9444459897857 is 7587989544449.

It is a Cunningham number, because it is equal to 3073184²+1.

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 3307538744896 + 6136921152961 = 1818664^2 + 2477281^2 .

It is a cyclic number.

It is not a de Polignac number, because 9444459897857 - 2⁴ = 9444459897841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9444459897827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154406744 + ... + 154467897.

It is an arithmetic number, because the mean of its divisors is an integer number (2361192200769).

Almost surely, 2^{9444459897857} is an apocalyptic number.

It is an amenable number.

9444459897857 is a deficient number, since it is larger than the sum of its proper divisors (308905219).

9444459897857 is a wasteful number, since it uses less digits than its factorization.

9444459897857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308905218.

The product of its digits is 14631321600, while the sum is 83.

The spelling of 9444459897857 in words is "nine trillion, four hundred forty-four billion, four hundred fifty-nine million, eight hundred ninety-seven thousand, eight hundred fifty-seven".