11657510243 has 2 divisors, whose sum is σ = 11657510244. Its totient is φ = 11657510242.

The previous prime is 11657510239. The next prime is 11657510257. The reversal of 11657510243 is 34201575611.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11657510243 - 2² = 11657510239 is a prime.

It is not a weakly prime, because it can be changed into another prime (11657510203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5828755121 + 5828755122.

It is an arithmetic number, because the mean of its divisors is an integer number (5828755122).

Almost surely, 2^11657510243 is an apocalyptic number.

11657510243 is a deficient number, since it is larger than the sum of its proper divisors (1).

11657510243 is an equidigital number, since it uses as much as digits as its factorization.

11657510243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 11657510243 in words is "eleven billion, six hundred fifty-seven million, five hundred ten thousand, two hundred forty-three".