63813864617 has 8 divisors (see below), whose sum is σ = 64699537920. Its totient is φ = 62928502560.

The previous prime is 63813864613. The next prime is 63813864637. The reversal of 63813864617 is 71646831836.

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

It is a cyclic number.

It is not a de Polignac number, because 63813864617 - 2² = 63813864613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63813864613) 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, 351392 + ... + 501102.

It is an arithmetic number, because the mean of its divisors is an integer number (8087442240).

Almost surely, 2^63813864617 is an apocalyptic number.

It is an amenable number.

63813864617 is a deficient number, since it is larger than the sum of its proper divisors (885673303).

63813864617 is a wasteful number, since it uses less digits than its factorization.

63813864617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155623.

The product of its digits is 3483648, while the sum is 53.

The spelling of 63813864617 in words is "sixty-three billion, eight hundred thirteen million, eight hundred sixty-four thousand, six hundred seventeen".