63660645265 has 32 divisors (see below), whose sum is σ = 89476773120. Its totient is φ = 42568627200.

The previous prime is 63660645193. The next prime is 63660645271. The reversal of 63660645265 is 56254606636.

It is not a de Polignac number, because 63660645265 - 2¹¹ = 63660643217 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3519645 + ... + 3537685.

It is an arithmetic number, because the mean of its divisors is an integer number (2796149160).

Almost surely, 2^63660645265 is an apocalyptic number.

It is an amenable number.

63660645265 is a deficient number, since it is larger than the sum of its proper divisors (25816127855).

63660645265 is a wasteful number, since it uses less digits than its factorization.

63660645265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20553.

The product of its (nonzero) digits is 4665600, while the sum is 49.

The spelling of 63660645265 in words is "sixty-three billion, six hundred sixty million, six hundred forty-five thousand, two hundred sixty-five".