13665512479 has 2 divisors, whose sum is σ = 13665512480. Its totient is φ = 13665512478.

The previous prime is 13665512467. The next prime is 13665512521. The reversal of 13665512479 is 97421556631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13665512479 - 2⁹ = 13665511967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13665512279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6832756239 + 6832756240.

It is an arithmetic number, because the mean of its divisors is an integer number (6832756240).

Almost surely, 2^13665512479 is an apocalyptic number.

13665512479 is a deficient number, since it is larger than the sum of its proper divisors (1).

13665512479 is an equidigital number, since it uses as much as digits as its factorization.

13665512479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1360800, while the sum is 49.

The spelling of 13665512479 in words is "thirteen billion, six hundred sixty-five million, five hundred twelve thousand, four hundred seventy-nine".