63081864 has 24 divisors (see below), whose sum is σ = 170846910. Its totient is φ = 21027264.

The previous prime is 63081841. The next prime is 63081877. The reversal of 63081864 is 46818036.

It is a happy number.

63081864 is a `hidden beast` number, since 630 + 8 + 18 + 6 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 56881764 + 6200100 = 7542^2 + 2490^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 437997 + ... + 438140.

Almost surely, 2^63081864 is an apocalyptic number.

It is an amenable number.

63081864 is an abundant number, since it is smaller than the sum of its proper divisors (107765046).

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

63081864 is a wasteful number, since it uses less digits than its factorization.

63081864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876149 (or 876142 counting only the distinct ones).

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

The square root of 63081864 is about 7942.4092062799. The cubic root of 63081864 is about 398.0779962121.

The spelling of 63081864 in words is "sixty-three million, eighty-one thousand, eight hundred sixty-four".