63213138579 has 4 divisors (see below), whose sum is σ = 84284184776. Its totient is φ = 42142092384.

The previous prime is 63213138551. The next prime is 63213138601. The reversal of 63213138579 is 97583131236.

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

It is not a de Polignac number, because 63213138579 - 2¹⁶ = 63213073043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63213138509) 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, 10535523094 + ... + 10535523099.

It is an arithmetic number, because the mean of its divisors is an integer number (21071046194).

Almost surely, 2^63213138579 is an apocalyptic number.

63213138579 is a deficient number, since it is larger than the sum of its proper divisors (21071046197).

63213138579 is a wasteful number, since it uses less digits than its factorization.

63213138579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21071046196.

The product of its digits is 816480, while the sum is 48.

The spelling of 63213138579 in words is "sixty-three billion, two hundred thirteen million, one hundred thirty-eight thousand, five hundred seventy-nine".