63981000255 has 16 divisors (see below), whose sum is σ = 102372871680. Its totient is φ = 34122109728.

The previous prime is 63981000229. The next prime is 63981000263. The reversal of 63981000255 is 55200018936.

It is not a de Polignac number, because 63981000255 - 2⁹ = 63980999743 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 686374 + ... + 773996.

It is an arithmetic number, because the mean of its divisors is an integer number (6398304480).

Almost surely, 2^63981000255 is an apocalyptic number.

63981000255 is a deficient number, since it is larger than the sum of its proper divisors (38391871425).

63981000255 is a wasteful number, since it uses less digits than its factorization.

63981000255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136310.

The product of its (nonzero) digits is 64800, while the sum is 39.

The spelling of 63981000255 in words is "sixty-three billion, nine hundred eighty-one million, two hundred fifty-five", and thus it is an aban number.