63331389449 has 2 divisors, whose sum is σ = 63331389450. Its totient is φ = 63331389448.

The previous prime is 63331389409. The next prime is 63331389461. The reversal of 63331389449 is 94498313336.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52438710025 + 10892679424 = 228995^2 + 104368^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63331389449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63331389449.

It is not a weakly prime, because it can be changed into another prime (63331389409) 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, 31665694724 + 31665694725.

It is an arithmetic number, because the mean of its divisors is an integer number (31665694725).

Almost surely, 2^63331389449 is an apocalyptic number.

It is an amenable number.

63331389449 is a deficient number, since it is larger than the sum of its proper divisors (1).

63331389449 is an equidigital number, since it uses as much as digits as its factorization.

63331389449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5038848, while the sum is 53.

The spelling of 63331389449 in words is "sixty-three billion, three hundred thirty-one million, three hundred eighty-nine thousand, four hundred forty-nine".