13424433515557 has 2 divisors, whose sum is σ = 13424433515558. Its totient is φ = 13424433515556.

The previous prime is 13424433515527. The next prime is 13424433515621. The reversal of 13424433515557 is 75551533442431.

It is a happy number.

13424433515557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11929570274241 + 1494863241316 = 3453921^2 + 1222646^2 .

It is an emirp because it is prime and its reverse (75551533442431) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13424433515557 is a prime.

It is a super-2 number, since 2×13424433515557² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13424433515527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6712216757778 + 6712216757779.

It is an arithmetic number, because the mean of its divisors is an integer number (6712216757779).

Almost surely, 2^{13424433515557} is an apocalyptic number.

It is an amenable number.

13424433515557 is a deficient number, since it is larger than the sum of its proper divisors (1).

13424433515557 is an equidigital number, since it uses as much as digits as its factorization.

13424433515557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120000, while the sum is 52.

Adding to 13424433515557 its reverse (75551533442431), we get a palindrome (88975966957988).

The spelling of 13424433515557 in words is "thirteen trillion, four hundred twenty-four billion, four hundred thirty-three million, five hundred fifteen thousand, five hundred fifty-seven".