64620664199 has 16 divisors (see below), whose sum is σ = 79553080320. Its totient is φ = 51115609440.

The previous prime is 64620664193. The next prime is 64620664289. The reversal of 64620664199 is 99146602646.

64620664199 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64620664199 - 2²⁰ = 64619615623 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 64620664199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64620664193) 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, 284144 + ... + 458234.

It is an arithmetic number, because the mean of its divisors is an integer number (4972067520).

Almost surely, 2^64620664199 is an apocalyptic number.

64620664199 is a deficient number, since it is larger than the sum of its proper divisors (14932416121).

64620664199 is a wasteful number, since it uses less digits than its factorization.

64620664199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178190.

The product of its (nonzero) digits is 3359232, while the sum is 53.

The spelling of 64620664199 in words is "sixty-four billion, six hundred twenty million, six hundred sixty-four thousand, one hundred ninety-nine".