63881338555111 has 24 divisors (see below), whose sum is σ = 81095001652224. Its totient is φ = 49760156360880.

The previous prime is 63881338555081. The next prime is 63881338555123. The reversal of 63881338555111 is 11155583318836.

63881338555111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 63881338555111 - 2¹³ = 63881338546919 is a prime.

It is a super-3 number, since 3×63881338555111³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63881338556111) 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 23 ways as a sum of consecutive naturals, for example, 19311495 + ... + 22376248.

It is an arithmetic number, because the mean of its divisors is an integer number (3378958402176).

Almost surely, 2^{63881338555111} is an apocalyptic number.

63881338555111 is a deficient number, since it is larger than the sum of its proper divisors (17213663097113).

63881338555111 is a wasteful number, since it uses less digits than its factorization.

63881338555111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41690611 (or 41690604 counting only the distinct ones).

The product of its digits is 10368000, while the sum is 58.

The spelling of 63881338555111 in words is "sixty-three trillion, eight hundred eighty-one billion, three hundred thirty-eight million, five hundred fifty-five thousand, one hundred eleven".