11545854557 has 2 divisors, whose sum is σ = 11545854558. Its totient is φ = 11545854556.

The previous prime is 11545854553. The next prime is 11545854587. The reversal of 11545854557 is 75545854511.

11545854557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8998229881 + 2547624676 = 94859^2 + 50474^2 .

It is an emirp because it is prime and its reverse (75545854511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11545854557 - 2² = 11545854553 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11545854553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5772927278 + 5772927279.

It is an arithmetic number, because the mean of its divisors is an integer number (5772927279).

Almost surely, 2^11545854557 is an apocalyptic number.

It is an amenable number.

11545854557 is a deficient number, since it is larger than the sum of its proper divisors (1).

11545854557 is an equidigital number, since it uses as much as digits as its factorization.

11545854557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2800000, while the sum is 50.

The spelling of 11545854557 in words is "eleven billion, five hundred forty-five million, eight hundred fifty-four thousand, five hundred fifty-seven".