641433657899 has 2 divisors, whose sum is σ = 641433657900. Its totient is φ = 641433657898.

The previous prime is 641433657871. The next prime is 641433657919. The reversal of 641433657899 is 998756334146.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641433657899 is a prime.

It is a super-2 number, since 2×641433657899² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (641433650899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320716828949 + 320716828950.

It is an arithmetic number, because the mean of its divisors is an integer number (320716828950).

Almost surely, 2^641433657899 is an apocalyptic number.

641433657899 is a deficient number, since it is larger than the sum of its proper divisors (1).

641433657899 is an equidigital number, since it uses as much as digits as its factorization.

641433657899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117573120, while the sum is 65.

The spelling of 641433657899 in words is "six hundred forty-one billion, four hundred thirty-three million, six hundred fifty-seven thousand, eight hundred ninety-nine".