63273144721 has 2 divisors, whose sum is σ = 63273144722. Its totient is φ = 63273144720.

The previous prime is 63273144689. The next prime is 63273144749. The reversal of 63273144721 is 12744137236.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62468004096 + 805140625 = 249936^2 + 28375^2 .

It is a cyclic number.

It is not a de Polignac number, because 63273144721 - 2⁵ = 63273144689 is a prime.

It is a super-2 number, since 2×63273144721² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63273144751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31636572360 + 31636572361.

It is an arithmetic number, because the mean of its divisors is an integer number (31636572361).

Almost surely, 2^63273144721 is an apocalyptic number.

It is an amenable number.

63273144721 is a deficient number, since it is larger than the sum of its proper divisors (1).

63273144721 is an equidigital number, since it uses as much as digits as its factorization.

63273144721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 40.

The spelling of 63273144721 in words is "sixty-three billion, two hundred seventy-three million, one hundred forty-four thousand, seven hundred twenty-one".