63561868 has 12 divisors (see below), whose sum is σ = 111406680. Its totient is φ = 31731392.

The previous prime is 63561829. The next prime is 63561887. The reversal of 63561868 is 86816536.

It is a super-2 number, since 2×63561868² = 8080222127298848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9421 + ... + 14692.

It is an arithmetic number, because the mean of its divisors is an integer number (9283890).

Almost surely, 2^63561868 is an apocalyptic number.

It is an amenable number.

63561868 is a deficient number, since it is larger than the sum of its proper divisors (47844812).

63561868 is a wasteful number, since it uses less digits than its factorization.

63561868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24776 (or 24774 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The square root of 63561868 is about 7972.5697237465. The cubic root of 63561868 is about 399.0851341464.

The spelling of 63561868 in words is "sixty-three million, five hundred sixty-one thousand, eight hundred sixty-eight".