63481945 has 16 divisors (see below), whose sum is σ = 80815680. Its totient is φ = 47736000.

The previous prime is 63481939. The next prime is 63481963. The reversal of 63481945 is 54918436.

It is not a de Polignac number, because 63481945 - 2³ = 63481937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63481898 and 63481907.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9895 + ... + 14995.

It is an arithmetic number, because the mean of its divisors is an integer number (5050980).

Almost surely, 2^63481945 is an apocalyptic number.

It is an amenable number.

63481945 is a deficient number, since it is larger than the sum of its proper divisors (17333735).

63481945 is a wasteful number, since it uses less digits than its factorization.

63481945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5256.

The product of its digits is 103680, while the sum is 40.

The square root of 63481945 is about 7967.5557732595. Note that the first 3 decimals coincide. The cubic root of 63481945 is about 398.9177934630.

The spelling of 63481945 in words is "sixty-three million, four hundred eighty-one thousand, nine hundred forty-five".