63256864 has 108 divisors (see below), whose sum is σ = 149766246. Its totient is φ = 26188800.

The previous prime is 63256861. The next prime is 63256883. The reversal of 63256864 is 46865236.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 46512400 + 16744464 = 6820^2 + 4092^2 .

It is a super-2 number, since 2×63256864² = 8002861686228992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63256861) 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 17 ways as a sum of consecutive naturals, for example, 2040529 + ... + 2040559.

Almost surely, 2^63256864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63256864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74883123).

63256864 is an abundant number, since it is smaller than the sum of its proper divisors (86509382).

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

63256864 is a wasteful number, since it uses less digits than its factorization.

63256864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 61 counting only the distinct ones).

The product of its digits is 207360, while the sum is 40.

The square root of 63256864 is about 7953.4183845690. The cubic root of 63256864 is about 398.4457687347.

The spelling of 63256864 in words is "sixty-three million, two hundred fifty-six thousand, eight hundred sixty-four".