63243664 has 40 divisors (see below), whose sum is σ = 138294720. Its totient is φ = 27753600.

The previous prime is 63243659. The next prime is 63243673. The reversal of 63243664 is 46634236.

It is a super-2 number, since 2×63243664² = 7999522072289792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1092 + ... + 11299.

It is an arithmetic number, because the mean of its divisors is an integer number (3457368).

Almost surely, 2^63243664 is an apocalyptic number.

It is an amenable number.

63243664 is an abundant number, since it is smaller than the sum of its proper divisors (75051056).

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

63243664 is a wasteful number, since it uses less digits than its factorization.

63243664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12439 (or 12433 counting only the distinct ones).

The product of its digits is 62208, while the sum is 34.

The square root of 63243664 is about 7952.5885094100. The cubic root of 63243664 is about 398.4180518479.

The spelling of 63243664 in words is "sixty-three million, two hundred forty-three thousand, six hundred sixty-four".