63531246749 has 2 divisors, whose sum is σ = 63531246750. Its totient is φ = 63531246748.

The previous prime is 63531246563. The next prime is 63531246761. The reversal of 63531246749 is 94764213536.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47982902500 + 15548344249 = 219050^2 + 124693^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63531246749 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 63531246697 and 63531246706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63531246049) 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 as a sum of consecutive naturals, namely, 31765623374 + 31765623375.

It is an arithmetic number, because the mean of its divisors is an integer number (31765623375).

Almost surely, 2^63531246749 is an apocalyptic number.

It is an amenable number.

63531246749 is a deficient number, since it is larger than the sum of its proper divisors (1).

63531246749 is an equidigital number, since it uses as much as digits as its factorization.

63531246749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 50.

The spelling of 63531246749 in words is "sixty-three billion, five hundred thirty-one million, two hundred forty-six thousand, seven hundred forty-nine".