64641373363433 has 4 divisors (see below), whose sum is σ = 64642212688128. Its totient is φ = 64640534038740.

The previous prime is 64641373363387. The next prime is 64641373363481. The reversal of 64641373363433 is 33436337314646.

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 64641373363433 - 2²⁴ = 64641356586217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64641373365433) 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, 419546813 + ... + 419700858.

It is an arithmetic number, because the mean of its divisors is an integer number (16160553172032).

Almost surely, 2^{64641373363433} is an apocalyptic number.

It is an amenable number.

64641373363433 is a deficient number, since it is larger than the sum of its proper divisors (839324695).

64641373363433 is an equidigital number, since it uses as much as digits as its factorization.

64641373363433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839324694.

The product of its digits is 70543872, while the sum is 56.

The spelling of 64641373363433 in words is "sixty-four trillion, six hundred forty-one billion, three hundred seventy-three million, three hundred sixty-three thousand, four hundred thirty-three".