63863649 has 6 divisors (see below), whose sum is σ = 92247506. Its totient is φ = 42575760.

The previous prime is 63863629. The next prime is 63863717. The reversal of 63863649 is 94636836.

63863649 is a `hidden beast` number, since 6 + 3 + 8 + 636 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 54863649 + 9000000 = 7407^2 + 3000^2 .

It is not a de Polignac number, because 63863649 - 2¹¹ = 63861601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63863629) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3547972 + ... + 3547989.

Almost surely, 2^63863649 is an apocalyptic number.

It is an amenable number.

63863649 is a deficient number, since it is larger than the sum of its proper divisors (28383857).

63863649 is a wasteful number, since it uses less digits than its factorization.

63863649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7095967 (or 7095964 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 63863649 is about 7991.4735186948. The cubic root of 63863649 is about 399.7157334458.

The spelling of 63863649 in words is "sixty-three million, eight hundred sixty-three thousand, six hundred forty-nine".