63581378 has 16 divisors (see below), whose sum is σ = 109408320. Its totient is φ = 27146256.

The previous prime is 63581363. The next prime is 63581381. The reversal of 63581378 is 87318536.

It is a Curzon number.

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, 4676 + ... + 12207.

It is an arithmetic number, because the mean of its divisors is an integer number (6838020).

Almost surely, 2^63581378 is an apocalyptic number.

63581378 is a deficient number, since it is larger than the sum of its proper divisors (45826942).

63581378 is a wasteful number, since it uses less digits than its factorization.

63581378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17161.

The product of its digits is 120960, while the sum is 41.

The square root of 63581378 is about 7973.7932002279. The cubic root of 63581378 is about 399.1259623700.

The spelling of 63581378 in words is "sixty-three million, five hundred eighty-one thousand, three hundred seventy-eight".