641515363 has 2 divisors, whose sum is σ = 641515364. Its totient is φ = 641515362.

The previous prime is 641515321. The next prime is 641515367. The reversal of 641515363 is 363515146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641515363 - 2¹⁷ = 641384291 is a prime.

It is not a weakly prime, because it can be changed into another prime (641515367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320757681 + 320757682.

It is an arithmetic number, because the mean of its divisors is an integer number (320757682).

Almost surely, 2^641515363 is an apocalyptic number.

641515363 is a deficient number, since it is larger than the sum of its proper divisors (1).

641515363 is an equidigital number, since it uses as much as digits as its factorization.

641515363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 34.

The square root of 641515363 is about 25328.1535647587. The cubic root of 641515363 is about 862.4534962815.

The spelling of 641515363 in words is "six hundred forty-one million, five hundred fifteen thousand, three hundred sixty-three".