63648215 has 4 divisors (see below), whose sum is σ = 76377864. Its totient is φ = 50918568.

The previous prime is 63648173. The next prime is 63648223. The reversal of 63648215 is 51284636.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63648215 - 2⁸ = 63647959 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 6364817 + ... + 6364826.

It is an arithmetic number, because the mean of its divisors is an integer number (19094466).

Almost surely, 2^63648215 is an apocalyptic number.

63648215 is a deficient number, since it is larger than the sum of its proper divisors (12729649).

63648215 is a wasteful number, since it uses less digits than its factorization.

63648215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12729648.

The product of its digits is 34560, while the sum is 35.

The square root of 63648215 is about 7977.9831411203. The cubic root of 63648215 is about 399.2657676652.

The spelling of 63648215 in words is "sixty-three million, six hundred forty-eight thousand, two hundred fifteen".