11557399387 has 2 divisors, whose sum is σ = 11557399388. Its totient is φ = 11557399386.

The previous prime is 11557399307. The next prime is 11557399393. The reversal of 11557399387 is 78399375511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11557399387 - 2¹⁵ = 11557366619 is a prime.

It is not a weakly prime, because it can be changed into another prime (11557399307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5778699693 + 5778699694.

It is an arithmetic number, because the mean of its divisors is an integer number (5778699694).

Almost surely, 2^11557399387 is an apocalyptic number.

11557399387 is a deficient number, since it is larger than the sum of its proper divisors (1).

11557399387 is an equidigital number, since it uses as much as digits as its factorization.

11557399387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7144200, while the sum is 58.

The spelling of 11557399387 in words is "eleven billion, five hundred fifty-seven million, three hundred ninety-nine thousand, three hundred eighty-seven".