63523565 has 16 divisors (see below), whose sum is σ = 87922560. Its totient is φ = 43156800.

The previous prime is 63523553. The next prime is 63523567. The reversal of 63523565 is 56532536.

It is not a de Polignac number, because 63523565 - 2⁴ = 63523549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63523567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4511 + ... + 12140.

It is an arithmetic number, because the mean of its divisors is an integer number (5495160).

Almost surely, 2^63523565 is an apocalyptic number.

It is an amenable number.

63523565 is a deficient number, since it is larger than the sum of its proper divisors (24398995).

63523565 is a wasteful number, since it uses less digits than its factorization.

63523565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16772.

The product of its digits is 81000, while the sum is 35.

The square root of 63523565 is about 7970.1671877069. The cubic root of 63523565 is about 399.0049538437.

The spelling of 63523565 in words is "sixty-three million, five hundred twenty-three thousand, five hundred sixty-five".