619644040969 has 2 divisors, whose sum is σ = 619644040970. Its totient is φ = 619644040968.

The previous prime is 619644040913. The next prime is 619644040993. The reversal of 619644040969 is 969040446916.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 619628737225 + 15303744 = 787165^2 + 3912^2 .

It is a cyclic number.

It is not a de Polignac number, because 619644040969 - 2²⁷ = 619509823241 is a prime.

It is a super-2 number, since 2×619644040969² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (619644040369) 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 as a sum of consecutive naturals, namely, 309822020484 + 309822020485.

It is an arithmetic number, because the mean of its divisors is an integer number (309822020485).

Almost surely, 2^619644040969 is an apocalyptic number.

It is an amenable number.

619644040969 is a deficient number, since it is larger than the sum of its proper divisors (1).

619644040969 is an equidigital number, since it uses as much as digits as its factorization.

619644040969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10077696, while the sum is 58.

The spelling of 619644040969 in words is "six hundred nineteen billion, six hundred forty-four million, forty thousand, nine hundred sixty-nine".