641105505899 has 2 divisors, whose sum is σ = 641105505900. Its totient is φ = 641105505898.

The previous prime is 641105505883. The next prime is 641105505917. The reversal of 641105505899 is 998505501146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 641105505899 - 2⁴ = 641105505883 is a prime.

It is a super-2 number, since 2×641105505899² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641105505899.

It is not a weakly prime, because it can be changed into another prime (641105525899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320552752949 + 320552752950.

It is an arithmetic number, because the mean of its divisors is an integer number (320552752950).

Almost surely, 2^641105505899 is an apocalyptic number.

641105505899 is a deficient number, since it is larger than the sum of its proper divisors (1).

641105505899 is an equidigital number, since it uses as much as digits as its factorization.

641105505899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944000, while the sum is 53.

The spelling of 641105505899 in words is "six hundred forty-one billion, one hundred five million, five hundred five thousand, eight hundred ninety-nine".