63801864 has 64 divisors (see below), whose sum is σ = 202550400. Its totient is φ = 18228672.

The previous prime is 63801823. The next prime is 63801869. The reversal of 63801864 is 46810836.

It is a happy number.

63801864 is a `hidden beast` number, since 638 + 0 + 18 + 6 + 4 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (63801869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19587 + ... + 22610.

It is an arithmetic number, because the mean of its divisors is an integer number (3164850).

Almost surely, 2^63801864 is an apocalyptic number.

It is an amenable number.

63801864 is an abundant number, since it is smaller than the sum of its proper divisors (138748536).

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

63801864 is a wasteful number, since it uses less digits than its factorization.

63801864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42219 (or 42209 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 63801864 is about 7987.6069006931. The cubic root of 63801864 is about 399.5867899573.

The spelling of 63801864 in words is "sixty-three million, eight hundred one thousand, eight hundred sixty-four".