11556975546 has 24 divisors (see below), whose sum is σ = 25165951200. Its totient is φ = 3832965576.

The previous prime is 11556975541. The next prime is 11556975569. The reversal of 11556975546 is 64557965511.

It is a happy number.

11556975546 is a `hidden beast` number, since 1 + 1 + 5 + 5 + 6 + 97 + 5 + 546 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 11556975492 and 11556975501.

It is not an unprimeable number, because it can be changed into a prime (11556975541) 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 11 ways as a sum of consecutive naturals, for example, 1609620 + ... + 1616783.

It is an arithmetic number, because the mean of its divisors is an integer number (1048581300).

Almost surely, 2^11556975546 is an apocalyptic number.

11556975546 is an abundant number, since it is smaller than the sum of its proper divisors (13608975654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11556975546 is a wasteful number, since it uses less digits than its factorization.

11556975546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3226610 (or 3226607 counting only the distinct ones).

The product of its digits is 5670000, while the sum is 54.

The spelling of 11556975546 in words is "eleven billion, five hundred fifty-six million, nine hundred seventy-five thousand, five hundred forty-six".