63978853881 has 64 divisors (see below), whose sum is σ = 98422456320. Its totient is φ = 36708940800.

The previous prime is 63978853879. The next prime is 63978853901. The reversal of 63978853881 is 18835887936.

It is not a de Polignac number, because 63978853881 - 2¹ = 63978853879 is a prime.

It is a super-2 number, since 2×63978853881² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63978853801) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4546306 + ... + 4560356.

It is an arithmetic number, because the mean of its divisors is an integer number (1537850880).

Almost surely, 2^63978853881 is an apocalyptic number.

It is an amenable number.

63978853881 is a deficient number, since it is larger than the sum of its proper divisors (34443602439).

63978853881 is a wasteful number, since it uses less digits than its factorization.

63978853881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14254.

The product of its digits is 69672960, while the sum is 66.

The spelling of 63978853881 in words is "sixty-three billion, nine hundred seventy-eight million, eight hundred fifty-three thousand, eight hundred eighty-one".