63128317313 has 2 divisors, whose sum is σ = 63128317314. Its totient is φ = 63128317312.

The previous prime is 63128317279. The next prime is 63128317319. The reversal of 63128317313 is 31371382136.

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., 60845102224 + 2283215089 = 246668^2 + 47783^2 .

It is a cyclic number.

It is not a de Polignac number, because 63128317313 - 2¹² = 63128313217 is a prime.

It is not a weakly prime, because it can be changed into another prime (63128317319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31564158656 + 31564158657.

It is an arithmetic number, because the mean of its divisors is an integer number (31564158657).

Almost surely, 2^63128317313 is an apocalyptic number.

It is an amenable number.

63128317313 is a deficient number, since it is larger than the sum of its proper divisors (1).

63128317313 is an equidigital number, since it uses as much as digits as its factorization.

63128317313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

Adding to 63128317313 its reverse (31371382136), we get a palindrome (94499699449).

The spelling of 63128317313 in words is "sixty-three billion, one hundred twenty-eight million, three hundred seventeen thousand, three hundred thirteen".