643141141369 has 2 divisors, whose sum is σ = 643141141370. Its totient is φ = 643141141368.

The previous prime is 643141141343. The next prime is 643141141381. The reversal of 643141141369 is 963141141346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 548618713344 + 94522428025 = 740688^2 + 307445^2 .

It is a cyclic number.

It is not a de Polignac number, because 643141141369 - 2⁹ = 643141140857 is a prime.

It is a super-2 number, since 2×643141141369² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (643141141319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321570570684 + 321570570685.

It is an arithmetic number, because the mean of its divisors is an integer number (321570570685).

Almost surely, 2^643141141369 is an apocalyptic number.

It is an amenable number.

643141141369 is a deficient number, since it is larger than the sum of its proper divisors (1).

643141141369 is an equidigital number, since it uses as much as digits as its factorization.

643141141369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 43.

The spelling of 643141141369 in words is "six hundred forty-three billion, one hundred forty-one million, one hundred forty-one thousand, three hundred sixty-nine".