63983601899 has 4 divisors (see below), whose sum is σ = 73124116464. Its totient is φ = 54843087336.

The previous prime is 63983601893. The next prime is 63983601901. The reversal of 63983601899 is 99810638936.

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 63983601899 - 2²⁸ = 63715166443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63983601893) 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, 4570257272 + ... + 4570257285.

It is an arithmetic number, because the mean of its divisors is an integer number (18281029116).

Almost surely, 2^63983601899 is an apocalyptic number.

63983601899 is a deficient number, since it is larger than the sum of its proper divisors (9140514565).

63983601899 is an equidigital number, since it uses as much as digits as its factorization.

63983601899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9140514564.

The product of its (nonzero) digits is 15116544, while the sum is 62.

The spelling of 63983601899 in words is "sixty-three billion, nine hundred eighty-three million, six hundred one thousand, eight hundred ninety-nine".