63878513793 has 8 divisors (see below), whose sum is σ = 85173443808. Its totient is φ = 42584629824.

The previous prime is 63878513791. The next prime is 63878513813. The reversal of 63878513793 is 39731587836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63878513793 - 2¹ = 63878513791 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (63878513791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105771 + ... + 372752.

It is an arithmetic number, because the mean of its divisors is an integer number (10646680476).

Almost surely, 2^63878513793 is an apocalyptic number.

It is an amenable number.

63878513793 is a deficient number, since it is larger than the sum of its proper divisors (21294930015).

63878513793 is a wasteful number, since it uses less digits than its factorization.

63878513793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523023.

The product of its digits is 22861440, while the sum is 60.

The spelling of 63878513793 in words is "sixty-three billion, eight hundred seventy-eight million, five hundred thirteen thousand, seven hundred ninety-three".