63981500 has 48 divisors (see below), whose sum is σ = 152451936. Its totient is φ = 23264000.

The previous prime is 63981481. The next prime is 63981503. The reversal of 63981500 is 518936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63981503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317 + ... + 11316.

It is an arithmetic number, because the mean of its divisors is an integer number (3176082).

Almost surely, 2^63981500 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 63981500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76225968).

63981500 is an abundant number, since it is smaller than the sum of its proper divisors (88470436).

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

63981500 is a wasteful number, since it uses less digits than its factorization.

63981500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11663 (or 11651 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 63981500 is about 7998.8436664308. The cubic root of 63981500 is about 399.9614546191.

The spelling of 63981500 in words is "sixty-three million, nine hundred eighty-one thousand, five hundred".