63563994 has 32 divisors (see below), whose sum is σ = 152120640. Its totient is φ = 19557936.

The previous prime is 63563989. The next prime is 63564023. The reversal of 63563994 is 49936536.

It is a happy number.

63563994 is a `hidden beast` number, since 6 + 3 + 5 + 639 + 9 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44572 + ... + 45975.

It is an arithmetic number, because the mean of its divisors is an integer number (4753770).

Almost surely, 2^63563994 is an apocalyptic number.

63563994 is an abundant number, since it is smaller than the sum of its proper divisors (88556646).

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

63563994 is a wasteful number, since it uses less digits than its factorization.

63563994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90571 (or 90565 counting only the distinct ones).

The product of its digits is 524880, while the sum is 45.

The square root of 63563994 is about 7972.7030547989. The cubic root of 63563994 is about 399.0895835937.

The spelling of 63563994 in words is "sixty-three million, five hundred sixty-three thousand, nine hundred ninety-four".