63864955 has 16 divisors (see below), whose sum is σ = 95549184. Its totient is φ = 39811680.

The previous prime is 63864919. The next prime is 63864961. The reversal of 63864955 is 55946836.

It is not a de Polignac number, because 63864955 - 2⁹ = 63864443 is a prime.

It is a Duffinian number.

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, 82557 + ... + 83326.

It is an arithmetic number, because the mean of its divisors is an integer number (5971824).

Almost surely, 2^63864955 is an apocalyptic number.

63864955 is a deficient number, since it is larger than the sum of its proper divisors (31684229).

63864955 is a wasteful number, since it uses less digits than its factorization.

63864955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165906.

The product of its digits is 777600, while the sum is 46.

The square root of 63864955 is about 7991.5552303666. Note that the first 3 decimals coincide. The cubic root of 63864955 is about 399.7184581319.

The spelling of 63864955 in words is "sixty-three million, eight hundred sixty-four thousand, nine hundred fifty-five".