63936489613 has 2 divisors, whose sum is σ = 63936489614. Its totient is φ = 63936489612.

The previous prime is 63936489607. The next prime is 63936489667. The reversal of 63936489613 is 31698463936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56008902244 + 7927587369 = 236662^2 + 89037^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63936489613 is a prime.

It is a super-3 number, since 3×63936489613³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63936489313) 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, 31968244806 + 31968244807.

It is an arithmetic number, because the mean of its divisors is an integer number (31968244807).

Almost surely, 2^63936489613 is an apocalyptic number.

It is an amenable number.

63936489613 is a deficient number, since it is larger than the sum of its proper divisors (1).

63936489613 is an equidigital number, since it uses as much as digits as its factorization.

63936489613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15116544, while the sum is 58.

The spelling of 63936489613 in words is "sixty-three billion, nine hundred thirty-six million, four hundred eighty-nine thousand, six hundred thirteen".