11557465537 has 2 divisors, whose sum is σ = 11557465538. Its totient is φ = 11557465536.

The previous prime is 11557465519. The next prime is 11557465637. The reversal of 11557465537 is 73556475511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10991215921 + 566249616 = 104839^2 + 23796^2 .

It is a cyclic number.

It is not a de Polignac number, because 11557465537 - 2²⁷ = 11423247809 is a prime.

It is not a weakly prime, because it can be changed into another prime (11557465237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5778732768 + 5778732769.

It is an arithmetic number, because the mean of its divisors is an integer number (5778732769).

Almost surely, 2^11557465537 is an apocalyptic number.

It is an amenable number.

11557465537 is a deficient number, since it is larger than the sum of its proper divisors (1).

11557465537 is an equidigital number, since it uses as much as digits as its factorization.

11557465537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2205000, while the sum is 49.

The spelling of 11557465537 in words is "eleven billion, five hundred fifty-seven million, four hundred sixty-five thousand, five hundred thirty-seven".