63381937851 has 12 divisors (see below), whose sum is σ = 91864154928. Its totient is φ = 42110409744.

The previous prime is 63381937799. The next prime is 63381937889. The reversal of 63381937851 is 15873918336.

63381937851 is a `hidden beast` number, since 6 + 338 + 193 + 78 + 51 = 666.

It is not a de Polignac number, because 63381937851 - 2¹¹ = 63381935803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63381937051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12015175 + ... + 12020448.

It is an arithmetic number, because the mean of its divisors is an integer number (7655346244).

Almost surely, 2^63381937851 is an apocalyptic number.

63381937851 is a deficient number, since it is larger than the sum of its proper divisors (28482217077).

63381937851 is a wasteful number, since it uses less digits than its factorization.

63381937851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24035922 (or 24035919 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The spelling of 63381937851 in words is "sixty-three billion, three hundred eighty-one million, nine hundred thirty-seven thousand, eight hundred fifty-one".