63585381 has 8 divisors (see below), whose sum is σ = 89242720. Its totient is φ = 40159152.

The previous prime is 63585373. The next prime is 63585397. The reversal of 63585381 is 18358536.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63585381 - 2³ = 63585373 is a prime.

It is a super-2 number, since 2×63585381² = 8086201353830322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63585311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557710 + ... + 557823.

It is an arithmetic number, because the mean of its divisors is an integer number (11155340).

Almost surely, 2^63585381 is an apocalyptic number.

It is an amenable number.

63585381 is a deficient number, since it is larger than the sum of its proper divisors (25657339).

63585381 is a wasteful number, since it uses less digits than its factorization.

63585381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115555.

The product of its digits is 86400, while the sum is 39.

The square root of 63585381 is about 7974.0442060475. The cubic root of 63585381 is about 399.1343383429.

The spelling of 63585381 in words is "sixty-three million, five hundred eighty-five thousand, three hundred eighty-one".