63605546993 has 2 divisors, whose sum is σ = 63605546994. Its totient is φ = 63605546992.

The previous prime is 63605546941. The next prime is 63605547079. The reversal of 63605546993 is 39964550636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62704166464 + 901380529 = 250408^2 + 30023^2 .

It is a cyclic number.

It is not a de Polignac number, because 63605546993 - 2²⁰ = 63604498417 is a prime.

It is not a weakly prime, because it can be changed into another prime (63605246993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31802773496 + 31802773497.

It is an arithmetic number, because the mean of its divisors is an integer number (31802773497).

Almost surely, 2^63605546993 is an apocalyptic number.

It is an amenable number.

63605546993 is a deficient number, since it is larger than the sum of its proper divisors (1).

63605546993 is an equidigital number, since it uses as much as digits as its factorization.

63605546993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15746400, while the sum is 56.

The spelling of 63605546993 in words is "sixty-three billion, six hundred five million, five hundred forty-six thousand, nine hundred ninety-three".