63675361561 has 16 divisors (see below), whose sum is σ = 77304726400. Its totient is φ = 51231927168.

The previous prime is 63675361531. The next prime is 63675361661. The reversal of 63675361561 is 16516357636.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 63675361561 - 2⁹ = 63675361049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63675361511) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2181660 + ... + 2210653.

It is an arithmetic number, because the mean of its divisors is an integer number (4831545400).

Almost surely, 2^63675361561 is an apocalyptic number.

It is an amenable number.

63675361561 is a deficient number, since it is larger than the sum of its proper divisors (13629364839).

63675361561 is a wasteful number, since it uses less digits than its factorization.

63675361561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4392448.

The product of its digits is 2041200, while the sum is 49.

The spelling of 63675361561 in words is "sixty-three billion, six hundred seventy-five million, three hundred sixty-one thousand, five hundred sixty-one".