641563413 has 32 divisors (see below), whose sum is σ = 889204992. Its totient is φ = 411264000.

The previous prime is 641563393. The next prime is 641563421. The reversal of 641563413 is 314365146.

It is not a de Polignac number, because 641563413 - 2¹³ = 641555221 is a prime.

It is a super-2 number, since 2×641563413² = 823207225800417138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641563453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1903581 + ... + 1903917.

It is an arithmetic number, because the mean of its divisors is an integer number (27787656).

Almost surely, 2^641563413 is an apocalyptic number.

It is an amenable number.

641563413 is a deficient number, since it is larger than the sum of its proper divisors (247641579).

641563413 is a wasteful number, since it uses less digits than its factorization.

641563413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605.

The product of its digits is 25920, while the sum is 33.

The square root of 641563413 is about 25329.1020962055. The cubic root of 641563413 is about 862.4750285566.

The spelling of 641563413 in words is "six hundred forty-one million, five hundred sixty-three thousand, four hundred thirteen".