6561697219433 has 2 divisors, whose sum is σ = 6561697219434. Its totient is φ = 6561697219432.

The previous prime is 6561697219403. The next prime is 6561697219457. The reversal of 6561697219433 is 3349127961656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5689737190489 + 871960028944 = 2385317^2 + 933788^2 .

It is a cyclic number.

It is not a de Polignac number, because 6561697219433 - 2¹⁶ = 6561697153897 is a prime.

It is not a weakly prime, because it can be changed into another prime (6561697219403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3280848609716 + 3280848609717.

It is an arithmetic number, because the mean of its divisors is an integer number (3280848609717).

Almost surely, 2^{6561697219433} is an apocalyptic number.

It is an amenable number.

6561697219433 is a deficient number, since it is larger than the sum of its proper divisors (1).

6561697219433 is an equidigital number, since it uses as much as digits as its factorization.

6561697219433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44089920, while the sum is 62.

The spelling of 6561697219433 in words is "six trillion, five hundred sixty-one billion, six hundred ninety-seven million, two hundred nineteen thousand, four hundred thirty-three".