11543540771 has 8 divisors (see below), whose sum is σ = 13766210304. Its totient is φ = 9464269320.

The previous prime is 11543540717. The next prime is 11543540777. The reversal of 11543540771 is 17704534511.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11543540771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11543540777) 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, 35849345 + ... + 35849666.

It is an arithmetic number, because the mean of its divisors is an integer number (1720776288).

Almost surely, 2^11543540771 is an apocalyptic number.

11543540771 is a deficient number, since it is larger than the sum of its proper divisors (2222669533).

11543540771 is an equidigital number, since it uses as much as digits as its factorization.

11543540771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71699041.

The product of its (nonzero) digits is 58800, while the sum is 38.

The spelling of 11543540771 in words is "eleven billion, five hundred forty-three million, five hundred forty thousand, seven hundred seventy-one".