63898381008 has 640 divisors, whose sum is σ = 235699200000. Its totient is φ = 16429754880.

The previous prime is 63898381003. The next prime is 63898381067. The reversal of 63898381008 is 80018389836.

It is a happy number.

63898381008 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63898381003) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 321097293 + ... + 321097491.

It is an arithmetic number, because the mean of its divisors is an integer number (368280000).

Almost surely, 2^63898381008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63898381008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117849600000).

63898381008 is an abundant number, since it is smaller than the sum of its proper divisors (171800818992).

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

63898381008 is a wasteful number, since it uses less digits than its factorization.

63898381008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The spelling of 63898381008 in words is "sixty-three billion, eight hundred ninety-eight million, three hundred eighty-one thousand, eight".