63663243899 has 4 divisors (see below), whose sum is σ = 65716896960. Its totient is φ = 61609590840.

The previous prime is 63663243887. The next prime is 63663243929. The reversal of 63663243899 is 99834236636.

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

It is a cyclic number.

It is not a de Polignac number, because 63663243899 - 2⁸ = 63663243643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63663243499) 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, 1026826484 + ... + 1026826545.

It is an arithmetic number, because the mean of its divisors is an integer number (16429224240).

Almost surely, 2^63663243899 is an apocalyptic number.

63663243899 is a deficient number, since it is larger than the sum of its proper divisors (2053653061).

63663243899 is a wasteful number, since it uses less digits than its factorization.

63663243899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053653060.

The product of its digits is 30233088, while the sum is 59.

The spelling of 63663243899 in words is "sixty-three billion, six hundred sixty-three million, two hundred forty-three thousand, eight hundred ninety-nine".