13315666495547 has 4 divisors (see below), whose sum is σ = 14339948533680. Its totient is φ = 12291384457416.

The previous prime is 13315666495519. The next prime is 13315666495567. The reversal of 13315666495547 is 74559466651331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13315666495547 - 2²² = 13315662301243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13315666495517) 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 in 3 ways as a sum of consecutive naturals, for example, 512141019047 + ... + 512141019072.

It is an arithmetic number, because the mean of its divisors is an integer number (3584987133420).

Almost surely, 2^{13315666495547} is an apocalyptic number.

13315666495547 is a deficient number, since it is larger than the sum of its proper divisors (1024282038133).

13315666495547 is a wasteful number, since it uses less digits than its factorization.

13315666495547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024282038132.

The product of its digits is 244944000, while the sum is 65.

The spelling of 13315666495547 in words is "thirteen trillion, three hundred fifteen billion, six hundred sixty-six million, four hundred ninety-five thousand, five hundred forty-seven".