11656657141 has 2 divisors, whose sum is σ = 11656657142. Its totient is φ = 11656657140.

The previous prime is 11656657139. The next prime is 11656657219. The reversal of 11656657141 is 14175665611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9499426225 + 2157230916 = 97465^2 + 46446^2 .

It is a cyclic number.

It is not a de Polignac number, because 11656657141 - 2¹ = 11656657139 is a prime.

Together with 11656657139, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11656651141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5828328570 + 5828328571.

It is an arithmetic number, because the mean of its divisors is an integer number (5828328571).

Almost surely, 2^11656657141 is an apocalyptic number.

It is an amenable number.

11656657141 is a deficient number, since it is larger than the sum of its proper divisors (1).

11656657141 is an equidigital number, since it uses as much as digits as its factorization.

11656657141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 43.

The spelling of 11656657141 in words is "eleven billion, six hundred fifty-six million, six hundred fifty-seven thousand, one hundred forty-one".