63889163888 has 40 divisors (see below), whose sum is σ = 135331556976. Its totient is φ = 28977497600.

The previous prime is 63889163861. The next prime is 63889163927. The reversal of 63889163888 is 88836198836.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312581 + ... + 474852.

Almost surely, 2^63889163888 is an apocalyptic number.

It is an amenable number.

63889163888 is an abundant number, since it is smaller than the sum of its proper divisors (71442393088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63889163888 is a wasteful number, since it uses less digits than its factorization.

63889163888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787913 (or 787907 counting only the distinct ones).

The product of its digits is 95551488, while the sum is 68.

The spelling of 63889163888 in words is "sixty-three billion, eight hundred eighty-nine million, one hundred sixty-three thousand, eight hundred eighty-eight".