2665322544449 has 2 divisors, whose sum is σ = 2665322544450. Its totient is φ = 2665322544448.

The previous prime is 2665322544419. The next prime is 2665322544457. The reversal of 2665322544449 is 9444452235662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1866680050225 + 798642494224 = 1366265^2 + 893668^2 .

It is a cyclic number.

It is not a de Polignac number, because 2665322544449 - 2⁸ = 2665322544193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2665322544394 and 2665322544403.

It is not a weakly prime, because it can be changed into another prime (2665322544419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332661272224 + 1332661272225.

It is an arithmetic number, because the mean of its divisors is an integer number (1332661272225).

Almost surely, 2^{2665322544449} is an apocalyptic number.

It is an amenable number.

2665322544449 is a deficient number, since it is larger than the sum of its proper divisors (1).

2665322544449 is an equidigital number, since it uses as much as digits as its factorization.

2665322544449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49766400, while the sum is 56.

The spelling of 2665322544449 in words is "two trillion, six hundred sixty-five billion, three hundred twenty-two million, five hundred forty-four thousand, four hundred forty-nine".