63040726817 has 2 divisors, whose sum is σ = 63040726818. Its totient is φ = 63040726816.

The previous prime is 63040726813. The next prime is 63040726891. The reversal of 63040726817 is 71862704036.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35419616401 + 27621110416 = 188201^2 + 166196^2 .

It is a cyclic number.

It is not a de Polignac number, because 63040726817 - 2² = 63040726813 is a prime.

It is not a weakly prime, because it can be changed into another prime (63040726813) 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 as a sum of consecutive naturals, namely, 31520363408 + 31520363409.

It is an arithmetic number, because the mean of its divisors is an integer number (31520363409).

Almost surely, 2^63040726817 is an apocalyptic number.

It is an amenable number.

63040726817 is a deficient number, since it is larger than the sum of its proper divisors (1).

63040726817 is an equidigital number, since it uses as much as digits as its factorization.

63040726817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 44.

The spelling of 63040726817 in words is "sixty-three billion, forty million, seven hundred twenty-six thousand, eight hundred seventeen".