11755821539 has 16 divisors (see below), whose sum is σ = 14697469440. Its totient is φ = 9134842560.

The previous prime is 11755821529. The next prime is 11755821577. The reversal of 11755821539 is 93512855711.

It is a cyclic number.

It is not a de Polignac number, because 11755821539 - 2²⁰ = 11754772963 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11755821493 and 11755821502.

It is not an unprimeable number, because it can be changed into a prime (11755821529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184994 + ... + 240279.

It is an arithmetic number, because the mean of its divisors is an integer number (918591840).

Almost surely, 2^11755821539 is an apocalyptic number.

11755821539 is a deficient number, since it is larger than the sum of its proper divisors (2941647901).

11755821539 is a wasteful number, since it uses less digits than its factorization.

11755821539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425650.

The product of its digits is 378000, while the sum is 47.

The spelling of 11755821539 in words is "eleven billion, seven hundred fifty-five million, eight hundred twenty-one thousand, five hundred thirty-nine".