641100641 has 16 divisors (see below), whose sum is σ = 697515840. Its totient is φ = 587220480.

The previous prime is 641100623. The next prime is 641100659. The reversal of 641100641 is 146001146.

641100641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (641100623) and next prime (641100659).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641100641 is a prime.

It is a super-2 number, since 2×641100641² = 822020063781221762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641100671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84386 + ... + 91668.

It is an arithmetic number, because the mean of its divisors is an integer number (43594740).

Almost surely, 2^641100641 is an apocalyptic number.

It is an amenable number.

641100641 is a deficient number, since it is larger than the sum of its proper divisors (56415199).

641100641 is a wasteful number, since it uses less digits than its factorization.

641100641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7456.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 641100641 is about 25319.9652645891. The cubic root of 641100641 is about 862.2676054135.

Adding to 641100641 its reverse (146001146), we get a palindrome (787101787).

The spelling of 641100641 in words is "six hundred forty-one million, one hundred thousand, six hundred forty-one".