63869644 has 6 divisors (see below), whose sum is σ = 111771884. Its totient is φ = 31934820.

The previous prime is 63869627. The next prime is 63869657. The reversal of 63869644 is 44696836.

It is a junction number, because it is equal to n+sod(n) for n = 63869594 and 63869603.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7983702 + ... + 7983709.

Almost surely, 2^63869644 is an apocalyptic number.

It is an amenable number.

63869644 is a deficient number, since it is larger than the sum of its proper divisors (47902240).

63869644 is a wasteful number, since it uses less digits than its factorization.

63869644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15967415 (or 15967413 counting only the distinct ones).

The product of its digits is 746496, while the sum is 46.

The square root of 63869644 is about 7991.8485971645. The cubic root of 63869644 is about 399.7282404086.

The spelling of 63869644 in words is "sixty-three million, eight hundred sixty-nine thousand, six hundred forty-four".