11547755557 has 8 divisors (see below), whose sum is σ = 12484437336. Its totient is φ = 10617987072.

The previous prime is 11547755519. The next prime is 11547755561. The reversal of 11547755557 is 75555774511.

It can be written as a sum of positive squares in 4 ways, for example, as 647142721 + 10900612836 = 25439^2 + 104406^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11547755557 - 2¹¹ = 11547753509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11547755507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1724848 + ... + 1731529.

It is an arithmetic number, because the mean of its divisors is an integer number (1560554667).

Almost surely, 2^11547755557 is an apocalyptic number.

It is an amenable number.

11547755557 is a deficient number, since it is larger than the sum of its proper divisors (936681779).

11547755557 is a wasteful number, since it uses less digits than its factorization.

11547755557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456647.

The product of its digits is 4287500, while the sum is 52.

The spelling of 11547755557 in words is "eleven billion, five hundred forty-seven million, seven hundred fifty-five thousand, five hundred fifty-seven".