63911916 has 72 divisors (see below), whose sum is σ = 171225600. Its totient is φ = 20835792.

The previous prime is 63911873. The next prime is 63911921. The reversal of 63911916 is 61911936.

63911916 is a `hidden beast` number, since 639 + 1 + 1 + 9 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44985 + ... + 46383.

Almost surely, 2^63911916 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 63911916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85612800).

63911916 is an abundant number, since it is smaller than the sum of its proper divisors (107313684).

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

63911916 is a wasteful number, since it uses less digits than its factorization.

63911916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465 (or 1451 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 63911916 is about 7994.4928544592. The cubic root of 63911916 is about 399.8164074140.

The spelling of 63911916 in words is "sixty-three million, nine hundred eleven thousand, nine hundred sixteen".