63328581 has 16 divisors (see below), whose sum is σ = 93942720. Its totient is φ = 42163920.

The previous prime is 63328579. The next prime is 63328583. The reversal of 63328581 is 18582336.

It is an interprime number because it is at equal distance from previous prime (63328579) and next prime (63328583).

It is not a de Polignac number, because 63328581 - 2¹ = 63328579 is a prime.

It is a super-2 number, since 2×63328581² = 8021018342947122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63328583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39526 + ... + 41096.

It is an arithmetic number, because the mean of its divisors is an integer number (5871420).

Almost surely, 2^63328581 is an apocalyptic number.

It is an amenable number.

63328581 is a deficient number, since it is larger than the sum of its proper divisors (30614139).

63328581 is a wasteful number, since it uses less digits than its factorization.

63328581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3073 (or 3067 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 63328581 is about 7957.9256719324. The cubic root of 63328581 is about 398.5962901757.

The spelling of 63328581 in words is "sixty-three million, three hundred twenty-eight thousand, five hundred eighty-one".