13661356434031 has 2 divisors, whose sum is σ = 13661356434032. Its totient is φ = 13661356434030.

The previous prime is 13661356433993. The next prime is 13661356434059. The reversal of 13661356434031 is 13043465316631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13661356434031 - 2⁷ = 13661356433903 is a prime.

It is a super-2 number, since 2×13661356434031² (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 (13661356494031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6830678217015 + 6830678217016.

It is an arithmetic number, because the mean of its divisors is an integer number (6830678217016).

Almost surely, 2^{13661356434031} is an apocalyptic number.

13661356434031 is a deficient number, since it is larger than the sum of its proper divisors (1).

13661356434031 is an equidigital number, since it uses as much as digits as its factorization.

13661356434031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 46.

The spelling of 13661356434031 in words is "thirteen trillion, six hundred sixty-one billion, three hundred fifty-six million, four hundred thirty-four thousand, thirty-one".