13565696087 has 2 divisors, whose sum is σ = 13565696088. Its totient is φ = 13565696086.

The previous prime is 13565696083. The next prime is 13565696173. The reversal of 13565696087 is 78069656531.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13565696087 - 2² = 13565696083 is a prime.

It is a super-2 number, since 2×13565696087² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13565696083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6782848043 + 6782848044.

It is an arithmetic number, because the mean of its divisors is an integer number (6782848044).

Almost surely, 2^13565696087 is an apocalyptic number.

13565696087 is a deficient number, since it is larger than the sum of its proper divisors (1).

13565696087 is an equidigital number, since it uses as much as digits as its factorization.

13565696087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8164800, while the sum is 56.

The spelling of 13565696087 in words is "thirteen billion, five hundred sixty-five million, six hundred ninety-six thousand, eighty-seven".