63664988099 has 4 divisors (see below), whose sum is σ = 63671321040. Its totient is φ = 63658655160.

The previous prime is 63664988089. The next prime is 63664988111. The reversal of 63664988099 is 99088946636.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63664988099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63664988059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3151367 + ... + 3171504.

It is an arithmetic number, because the mean of its divisors is an integer number (15917830260).

Almost surely, 2^63664988099 is an apocalyptic number.

63664988099 is a deficient number, since it is larger than the sum of its proper divisors (6332941).

63664988099 is a wasteful number, since it uses less digits than its factorization.

63664988099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6332940.

The product of its (nonzero) digits is 120932352, while the sum is 68.

The spelling of 63664988099 in words is "sixty-three billion, six hundred sixty-four million, nine hundred eighty-eight thousand, ninety-nine".