63865572 has 48 divisors (see below), whose sum is σ = 156643200. Its totient is φ = 20213248.

The previous prime is 63865567. The next prime is 63865579. The reversal of 63865572 is 27556836.

63865572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×63865572² = 8157622573774368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63865579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40348 + ... + 41900.

It is an arithmetic number, because the mean of its divisors is an integer number (3263400).

Almost surely, 2^63865572 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 63865572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78321600).

63865572 is an abundant number, since it is smaller than the sum of its proper divisors (92777628).

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

63865572 is a wasteful number, since it uses less digits than its factorization.

63865572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732 (or 1730 counting only the distinct ones).

The product of its digits is 302400, while the sum is 42.

The square root of 63865572 is about 7991.5938335228. The cubic root of 63865572 is about 399.7197453559.

The spelling of 63865572 in words is "sixty-three million, eight hundred sixty-five thousand, five hundred seventy-two".