63195518317 has 4 divisors (see below), whose sum is σ = 65234083456. Its totient is φ = 61156953180.

The previous prime is 63195518279. The next prime is 63195518329. The reversal of 63195518317 is 71381559136.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63195518317 - 2¹¹ = 63195516269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63195518357) 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, 1019282523 + ... + 1019282584.

It is an arithmetic number, because the mean of its divisors is an integer number (16308520864).

Almost surely, 2^63195518317 is an apocalyptic number.

It is an amenable number.

63195518317 is a deficient number, since it is larger than the sum of its proper divisors (2038565139).

63195518317 is a wasteful number, since it uses less digits than its factorization.

63195518317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2038565138.

The product of its digits is 680400, while the sum is 49.

The spelling of 63195518317 in words is "sixty-three billion, one hundred ninety-five million, five hundred eighteen thousand, three hundred seventeen".