63779756413 has 2 divisors, whose sum is σ = 63779756414. Its totient is φ = 63779756412.

The previous prime is 63779756329. The next prime is 63779756441. The reversal of 63779756413 is 31465797736.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62441513689 + 1338242724 = 249883^2 + 36582^2 .

It is a cyclic number.

It is not a de Polignac number, because 63779756413 - 2³³ = 55189821821 is a prime.

It is a super-3 number, since 3×63779756413³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63779750413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31889878206 + 31889878207.

It is an arithmetic number, because the mean of its divisors is an integer number (31889878207).

Almost surely, 2^63779756413 is an apocalyptic number.

It is an amenable number.

63779756413 is a deficient number, since it is larger than the sum of its proper divisors (1).

63779756413 is an equidigital number, since it uses as much as digits as its factorization.

63779756413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20003760, while the sum is 58.

The spelling of 63779756413 in words is "sixty-three billion, seven hundred seventy-nine million, seven hundred fifty-six thousand, four hundred thirteen".