11656515653 has 2 divisors, whose sum is σ = 11656515654. Its totient is φ = 11656515652.

The previous prime is 11656515643. The next prime is 11656515707. The reversal of 11656515653 is 35651565611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10819744324 + 836771329 = 104018^2 + 28927^2 .

It is a cyclic number.

It is not a de Polignac number, because 11656515653 - 2¹⁴ = 11656499269 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11656515643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5828257826 + 5828257827.

It is an arithmetic number, because the mean of its divisors is an integer number (5828257827).

Almost surely, 2^11656515653 is an apocalyptic number.

It is an amenable number.

11656515653 is a deficient number, since it is larger than the sum of its proper divisors (1).

11656515653 is an equidigital number, since it uses as much as digits as its factorization.

11656515653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 405000, while the sum is 44.

The spelling of 11656515653 in words is "eleven billion, six hundred fifty-six million, five hundred fifteen thousand, six hundred fifty-three".