64323505203 has 4 divisors (see below), whose sum is σ = 85764673608. Its totient is φ = 42882336800.

The previous prime is 64323505133. The next prime is 64323505229. The reversal of 64323505203 is 30250532346.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64323505203 - 2¹⁷ = 64323374131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64323505283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10720584198 + ... + 10720584203.

It is an arithmetic number, because the mean of its divisors is an integer number (21441168402).

Almost surely, 2^64323505203 is an apocalyptic number.

64323505203 is a deficient number, since it is larger than the sum of its proper divisors (21441168405).

64323505203 is a wasteful number, since it uses less digits than its factorization.

64323505203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21441168404.

The product of its (nonzero) digits is 64800, while the sum is 33.

The spelling of 64323505203 in words is "sixty-four billion, three hundred twenty-three million, five hundred five thousand, two hundred three".