63813918379 has 2 divisors, whose sum is σ = 63813918380. Its totient is φ = 63813918378.

The previous prime is 63813918367. The next prime is 63813918397. The reversal of 63813918379 is 97381931836.

It is a happy number.

Together with next prime (63813918397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63813918379 - 2²³ = 63805529771 is a prime.

It is not a weakly prime, because it can be changed into another prime (63813948379) 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 as a sum of consecutive naturals, namely, 31906959189 + 31906959190.

It is an arithmetic number, because the mean of its divisors is an integer number (31906959190).

Almost surely, 2^63813918379 is an apocalyptic number.

63813918379 is a deficient number, since it is larger than the sum of its proper divisors (1).

63813918379 is an equidigital number, since it uses as much as digits as its factorization.

63813918379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 58.

The spelling of 63813918379 in words is "sixty-three billion, eight hundred thirteen million, nine hundred eighteen thousand, three hundred seventy-nine".