63523300081 has 4 divisors (see below), whose sum is σ = 63523928692. Its totient is φ = 63522671472.

The previous prime is 63523300069. The next prime is 63523300091. The reversal of 63523300081 is 18000332536.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1050797056 + 62472503025 = 32416^2 + 249945^2 .

It is a cyclic number.

It is not a de Polignac number, because 63523300081 - 2¹⁷ = 63523169009 is a prime.

It is a super-2 number, since 2×63523300081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63523300031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124530 + ... + 377563.

It is an arithmetic number, because the mean of its divisors is an integer number (15880982173).

Almost surely, 2^63523300081 is an apocalyptic number.

It is an amenable number.

63523300081 is a deficient number, since it is larger than the sum of its proper divisors (628611).

63523300081 is a wasteful number, since it uses less digits than its factorization.

63523300081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628610.

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 63523300081 in words is "sixty-three billion, five hundred twenty-three million, three hundred thousand, eighty-one".