63699864 has 16 divisors (see below), whose sum is σ = 159249720. Its totient is φ = 21233280.

The previous prime is 63699847. The next prime is 63699871. The reversal of 63699864 is 46899636.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1327057 + ... + 1327104.

Almost surely, 2^63699864 is an apocalyptic number.

It is an amenable number.

63699864 is an abundant number, since it is smaller than the sum of its proper divisors (95549856).

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

63699864 is a wasteful number, since it uses less digits than its factorization.

63699864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654170 (or 2654166 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 51.

The square root of 63699864 is about 7981.2194556972. The cubic root of 63699864 is about 399.3737366640.

The spelling of 63699864 in words is "sixty-three million, six hundred ninety-nine thousand, eight hundred sixty-four".