63645634 has 16 divisors (see below), whose sum is σ = 104223672. Its totient is φ = 28971648.

The previous prime is 63645599. The next prime is 63645641. The reversal of 63645634 is 43654636.

It can be written as a sum of positive squares in 4 ways, for example, as 54066609 + 9579025 = 7353^2 + 3095^2 .

It is a junction number, because it is equal to n+sod(n) for n = 63645593 and 63645602.

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, 14869 + ... + 18664.

Almost surely, 2^63645634 is an apocalyptic number.

63645634 is a deficient number, since it is larger than the sum of its proper divisors (40578038).

63645634 is a wasteful number, since it uses less digits than its factorization.

63645634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33621.

The product of its digits is 155520, while the sum is 37.

The square root of 63645634 is about 7977.8213818059. The cubic root of 63645634 is about 399.2603707142.

The spelling of 63645634 in words is "sixty-three million, six hundred forty-five thousand, six hundred thirty-four".