11571115147 has 4 divisors (see below), whose sum is σ = 11608083880. Its totient is φ = 11534146416.

The previous prime is 11571115111. The next prime is 11571115169. The reversal of 11571115147 is 74151117511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74151117511 = 83423 ⋅888857.

It is a cyclic number.

It is not a de Polignac number, because 11571115147 - 2⁷ = 11571115019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11571115177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18483897 + ... + 18484522.

It is an arithmetic number, because the mean of its divisors is an integer number (2902020970).

Almost surely, 2^11571115147 is an apocalyptic number.

11571115147 is a deficient number, since it is larger than the sum of its proper divisors (36968733).

11571115147 is an equidigital number, since it uses as much as digits as its factorization.

11571115147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36968732.

The product of its digits is 4900, while the sum is 34.

The spelling of 11571115147 in words is "eleven billion, five hundred seventy-one million, one hundred fifteen thousand, one hundred forty-seven".