641032541813 has 2 divisors, whose sum is σ = 641032541814. Its totient is φ = 641032541812.

The previous prime is 641032541761. The next prime is 641032541879. The reversal of 641032541813 is 318145230146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 630726637489 + 10305904324 = 794183^2 + 101518^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641032541813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641032541113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320516270906 + 320516270907.

It is an arithmetic number, because the mean of its divisors is an integer number (320516270907).

Almost surely, 2^641032541813 is an apocalyptic number.

It is an amenable number.

641032541813 is a deficient number, since it is larger than the sum of its proper divisors (1).

641032541813 is an equidigital number, since it uses as much as digits as its factorization.

641032541813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

Adding to 641032541813 its reverse (318145230146), we get a palindrome (959177771959).

The spelling of 641032541813 in words is "six hundred forty-one billion, thirty-two million, five hundred forty-one thousand, eight hundred thirteen".