642453160589 has 2 divisors, whose sum is σ = 642453160590. Its totient is φ = 642453160588.

The previous prime is 642453160543. The next prime is 642453160633. The reversal of 642453160589 is 985061354246.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 639288198025 + 3164962564 = 799555^2 + 56258^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-642453160589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 642453160589.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642453160529) 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, 321226580294 + 321226580295.

It is an arithmetic number, because the mean of its divisors is an integer number (321226580295).

Almost surely, 2^642453160589 is an apocalyptic number.

It is an amenable number.

642453160589 is a deficient number, since it is larger than the sum of its proper divisors (1).

642453160589 is an equidigital number, since it uses as much as digits as its factorization.

642453160589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6220800, while the sum is 53.

The spelling of 642453160589 in words is "six hundred forty-two billion, four hundred fifty-three million, one hundred sixty thousand, five hundred eighty-nine".