63564605365 has 16 divisors (see below), whose sum is σ = 76746000240. Its totient is φ = 50539714560.

The previous prime is 63564605323. The next prime is 63564605417. The reversal of 63564605365 is 56350646536.

It can be written as a sum of positive squares in 8 ways, for example, as 9186961 + 63555418404 = 3031^2 + 252102^2 .

It is a de Polignac number, because none of the positive numbers 2^k-63564605365 is a prime.

It is a congruent 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, 1515091 + ... + 1556479.

It is an arithmetic number, because the mean of its divisors is an integer number (4796625015).

Almost surely, 2^63564605365 is an apocalyptic number.

It is an amenable number.

63564605365 is a deficient number, since it is larger than the sum of its proper divisors (13181394875).

63564605365 is a wasteful number, since it uses less digits than its factorization.

63564605365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43272.

The product of its (nonzero) digits is 5832000, while the sum is 49.

The spelling of 63564605365 in words is "sixty-three billion, five hundred sixty-four million, six hundred five thousand, three hundred sixty-five".