63723328447 has 4 divisors (see below), whose sum is σ = 64091671560. Its totient is φ = 63354985336.

The previous prime is 63723328441. The next prime is 63723328451. The reversal of 63723328447 is 74482332736.

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 63723328447 - 2³⁵ = 29363590079 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 63723328447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63723328441) 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, 184171297 + ... + 184171642.

It is an arithmetic number, because the mean of its divisors is an integer number (16022917890).

Almost surely, 2^63723328447 is an apocalyptic number.

63723328447 is a deficient number, since it is larger than the sum of its proper divisors (368343113).

63723328447 is a wasteful number, since it uses less digits than its factorization.

63723328447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368343112.

The product of its digits is 4064256, while the sum is 49.

The spelling of 63723328447 in words is "sixty-three billion, seven hundred twenty-three million, three hundred twenty-eight thousand, four hundred forty-seven".