13535257891 has 2 divisors, whose sum is σ = 13535257892. Its totient is φ = 13535257890.

The previous prime is 13535257889. The next prime is 13535257903. The reversal of 13535257891 is 19875253531.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13535257891 - 2¹ = 13535257889 is a prime.

Together with 13535257889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13535257811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6767628945 + 6767628946.

It is an arithmetic number, because the mean of its divisors is an integer number (6767628946).

Almost surely, 2^13535257891 is an apocalyptic number.

13535257891 is a deficient number, since it is larger than the sum of its proper divisors (1).

13535257891 is an equidigital number, since it uses as much as digits as its factorization.

13535257891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134000, while the sum is 49.

The spelling of 13535257891 in words is "thirteen billion, five hundred thirty-five million, two hundred fifty-seven thousand, eight hundred ninety-one".