6445989740933 has 2 divisors, whose sum is σ = 6445989740934. Its totient is φ = 6445989740932.

The previous prime is 6445989740807. The next prime is 6445989741001. The reversal of 6445989740933 is 3390479895446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5097042221569 + 1348947519364 = 2257663^2 + 1161442^2 .

It is a cyclic number.

It is not a de Polignac number, because 6445989740933 - 2²⁶ = 6445922632069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6445989749933) by changing a digit.

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 as a sum of consecutive naturals, namely, 3222994870466 + 3222994870467.

It is an arithmetic number, because the mean of its divisors is an integer number (3222994870467).

Almost surely, 2^{6445989740933} is an apocalyptic number.

It is an amenable number.

6445989740933 is a deficient number, since it is larger than the sum of its proper divisors (1).

6445989740933 is an equidigital number, since it uses as much as digits as its factorization.

6445989740933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 705438720, while the sum is 71.

The spelling of 6445989740933 in words is "six trillion, four hundred forty-five billion, nine hundred eighty-nine million, seven hundred forty thousand, nine hundred thirty-three".