641015603 has 2 divisors, whose sum is σ = 641015604. Its totient is φ = 641015602.

The previous prime is 641015579. The next prime is 641015611. The reversal of 641015603 is 306510146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641015603 - 2¹⁸ = 640753459 is a prime.

It is not a weakly prime, because it can be changed into another prime (641015003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320507801 + 320507802.

It is an arithmetic number, because the mean of its divisors is an integer number (320507802).

Almost surely, 2^641015603 is an apocalyptic number.

641015603 is a deficient number, since it is larger than the sum of its proper divisors (1).

641015603 is an equidigital number, since it uses as much as digits as its factorization.

641015603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 641015603 is about 25318.2859411928. The cubic root of 641015603 is about 862.2294789217.

Adding to 641015603 its reverse (306510146), we get a palindrome (947525749).

The spelling of 641015603 in words is "six hundred forty-one million, fifteen thousand, six hundred three".