13621446497 has 2 divisors, whose sum is σ = 13621446498. Its totient is φ = 13621446496.

The previous prime is 13621446463. The next prime is 13621446547. The reversal of 13621446497 is 79464412631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13614455761 + 6990736 = 116681^2 + 2644^2 .

It is a cyclic number.

It is not a de Polignac number, because 13621446497 - 2¹⁰ = 13621445473 is a prime.

It is not a weakly prime, because it can be changed into another prime (13623446497) 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, 6810723248 + 6810723249.

It is an arithmetic number, because the mean of its divisors is an integer number (6810723249).

Almost surely, 2^13621446497 is an apocalyptic number.

It is an amenable number.

13621446497 is a deficient number, since it is larger than the sum of its proper divisors (1).

13621446497 is an equidigital number, since it uses as much as digits as its factorization.

13621446497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 47.

The spelling of 13621446497 in words is "thirteen billion, six hundred twenty-one million, four hundred forty-six thousand, four hundred ninety-seven".