63591040 has 64 divisors (see below), whose sum is σ = 154395360. Its totient is φ = 25039872.

The previous prime is 63591037. The next prime is 63591053. The reversal of 63591040 is 4019536.

It is a tau number, because it is divible by the number of its divisors (64).

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, 42139 + ... + 43621.

Almost surely, 2^63591040 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 63591040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77197680).

63591040 is an abundant number, since it is smaller than the sum of its proper divisors (90804320).

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

63591040 is a wasteful number, since it uses less digits than its factorization.

63591040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569 (or 1557 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 63591040 is about 7974.3990369181. The cubic root of 63591040 is about 399.1461787700.

The spelling of 63591040 in words is "sixty-three million, five hundred ninety-one thousand, forty".