11561377147 has 4 divisors (see below), whose sum is σ = 11562403320. Its totient is φ = 11560350976.

The previous prime is 11561377141. The next prime is 11561377159. The reversal of 11561377147 is 74177316511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11561377147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11561377141) 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 3 ways as a sum of consecutive naturals, for example, 495997 + ... + 518782.

It is an arithmetic number, because the mean of its divisors is an integer number (2890600830).

Almost surely, 2^11561377147 is an apocalyptic number.

11561377147 is a deficient number, since it is larger than the sum of its proper divisors (1026173).

11561377147 is a wasteful number, since it uses less digits than its factorization.

11561377147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026172.

The product of its digits is 123480, while the sum is 43.

The spelling of 11561377147 in words is "eleven billion, five hundred sixty-one million, three hundred seventy-seven thousand, one hundred forty-seven".