11656535251 has 2 divisors, whose sum is σ = 11656535252. Its totient is φ = 11656535250.

The previous prime is 11656535237. The next prime is 11656535257. The reversal of 11656535251 is 15253565611.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11656535251 - 2¹⁹ = 11656010963 is a prime.

It is not a weakly prime, because it can be changed into another prime (11656535257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5828267625 + 5828267626.

It is an arithmetic number, because the mean of its divisors is an integer number (5828267626).

Almost surely, 2^11656535251 is an apocalyptic number.

11656535251 is a deficient number, since it is larger than the sum of its proper divisors (1).

11656535251 is an equidigital number, since it uses as much as digits as its factorization.

11656535251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 135000, while the sum is 40.

The spelling of 11656535251 in words is "eleven billion, six hundred fifty-six million, five hundred thirty-five thousand, two hundred fifty-one".