11556126539 has 8 divisors (see below), whose sum is σ = 11674474560. Its totient is φ = 11438281800.

The previous prime is 11556126523. The next prime is 11556126563. The reversal of 11556126539 is 93562165511.

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 11556126539 - 2⁴ = 11556126523 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11556126539.

It is not an unprimeable number, because it can be changed into a prime (11556126599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79577 + ... + 171594.

It is an arithmetic number, because the mean of its divisors is an integer number (1459309320).

Almost surely, 2^11556126539 is an apocalyptic number.

11556126539 is a deficient number, since it is larger than the sum of its proper divisors (118348021).

11556126539 is a wasteful number, since it uses less digits than its factorization.

11556126539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251641.

The product of its digits is 243000, while the sum is 44.

The spelling of 11556126539 in words is "eleven billion, five hundred fifty-six million, one hundred twenty-six thousand, five hundred thirty-nine".