63641773213 has 4 divisors (see below), whose sum is σ = 64538136288. Its totient is φ = 62745410140.

The previous prime is 63641773201. The next prime is 63641773243. The reversal of 63641773213 is 31237714636.

It is a happy number.

63641773213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63641773213 - 2²⁵ = 63608218781 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 63641773213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63641773243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448181431 + ... + 448181572.

It is an arithmetic number, because the mean of its divisors is an integer number (16134534072).

Almost surely, 2^63641773213 is an apocalyptic number.

It is an amenable number.

63641773213 is a deficient number, since it is larger than the sum of its proper divisors (896363075).

63641773213 is an equidigital number, since it uses as much as digits as its factorization.

63641773213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896363074.

The product of its digits is 381024, while the sum is 43.

The spelling of 63641773213 in words is "sixty-three billion, six hundred forty-one million, seven hundred seventy-three thousand, two hundred thirteen".