63718749660431 has 8 divisors (see below), whose sum is σ = 63780006781344. Its totient is φ = 63657495012960.

The previous prime is 63718749660421. The next prime is 63718749660473. The reversal of 63718749660431 is 13406694781736.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63718749660431 is a prime.

It is a super-2 number, since 2×63718749660431² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63718749660421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53175065 + ... + 54360141.

It is an arithmetic number, because the mean of its divisors is an integer number (7972500847668).

Almost surely, 2^{63718749660431} is an apocalyptic number.

63718749660431 is a deficient number, since it is larger than the sum of its proper divisors (61257120913).

63718749660431 is a wasteful number, since it uses less digits than its factorization.

63718749660431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236721.

The product of its (nonzero) digits is 109734912, while the sum is 65.

The spelling of 63718749660431 in words is "sixty-three trillion, seven hundred eighteen billion, seven hundred forty-nine million, six hundred sixty thousand, four hundred thirty-one".