641683615 has 32 divisors (see below), whose sum is σ = 829785600. Its totient is φ = 474660864.

The previous prime is 641683613. The next prime is 641683633. The reversal of 641683615 is 516386146.

It is a cyclic number.

It is not a de Polignac number, because 641683615 - 2¹ = 641683613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641683613) 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, 1838461 + ... + 1838809.

It is an arithmetic number, because the mean of its divisors is an integer number (25930800).

Almost surely, 2^641683615 is an apocalyptic number.

641683615 is a deficient number, since it is larger than the sum of its proper divisors (188101985).

641683615 is a wasteful number, since it uses less digits than its factorization.

641683615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691.

The product of its digits is 103680, while the sum is 40.

The square root of 641683615 is about 25331.4747892814. The cubic root of 641683615 is about 862.5288890415.

The spelling of 641683615 in words is "six hundred forty-one million, six hundred eighty-three thousand, six hundred fifteen".