641535640513 has 12 divisors (see below), whose sum is σ = 658635344640. Its totient is φ = 624596915720.

The previous prime is 641535640483. The next prime is 641535640541. The reversal of 641535640513 is 315046535146.

It is not a de Polignac number, because 641535640513 - 2¹⁷ = 641535509441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 641535640513.

It is not an unprimeable number, because it can be changed into a prime (641535640553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1527528 + ... + 1901686.

It is an arithmetic number, because the mean of its divisors is an integer number (54886278720).

Almost surely, 2^641535640513 is an apocalyptic number.

It is an amenable number.

641535640513 is a deficient number, since it is larger than the sum of its proper divisors (17099704127).

641535640513 is an equidigital number, since it uses as much as digits as its factorization.

641535640513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374588 (or 374397 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 641535640513 in words is "six hundred forty-one billion, five hundred thirty-five million, six hundred forty thousand, five hundred thirteen".