63520855 has 4 divisors (see below), whose sum is σ = 76225032. Its totient is φ = 50816680.

The previous prime is 63520843. The next prime is 63520861. The reversal of 63520855 is 55802536.

It is a happy number.

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

It is not a de Polignac number, because 63520855 - 2¹⁹ = 62996567 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63520855.

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, 6352081 + ... + 6352090.

It is an arithmetic number, because the mean of its divisors is an integer number (19056258).

Almost surely, 2^63520855 is an apocalyptic number.

63520855 is a deficient number, since it is larger than the sum of its proper divisors (12704177).

63520855 is a wasteful number, since it uses less digits than its factorization.

63520855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12704176.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 63520855 is about 7969.9971769129. The cubic root of 63520855 is about 398.9992797352. Note that the first 3 decimals are identical.

The spelling of 63520855 in words is "sixty-three million, five hundred twenty thousand, eight hundred fifty-five".