63998903727 has 24 divisors (see below), whose sum is σ = 100872587088. Its totient is φ = 38777280000.

The previous prime is 63998903719. The next prime is 63998903729. The reversal of 63998903727 is 72730989936.

It is not a de Polignac number, because 63998903727 - 2³ = 63998903719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63998903729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 315313 + ... + 476885.

It is an arithmetic number, because the mean of its divisors is an integer number (4203024462).

Almost surely, 2^63998903727 is an apocalyptic number.

63998903727 is a deficient number, since it is larger than the sum of its proper divisors (36873683361).

63998903727 is a wasteful number, since it uses less digits than its factorization.

63998903727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165591 (or 165588 counting only the distinct ones).

The product of its (nonzero) digits is 30862944, while the sum is 63.

The spelling of 63998903727 in words is "sixty-three billion, nine hundred ninety-eight million, nine hundred three thousand, seven hundred twenty-seven".