11147385887 has 4 divisors (see below), whose sum is σ = 12160784616. Its totient is φ = 10133987160.

The previous prime is 11147385871. The next prime is 11147385947. The reversal of 11147385887 is 78858374111.

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

It is not a de Polignac number, because 11147385887 - 2⁴ = 11147385871 is a prime.

It is a super-2 number, since 2×11147385887² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11147355887) 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, 506699348 + ... + 506699369.

It is an arithmetic number, because the mean of its divisors is an integer number (3040196154).

Almost surely, 2^11147385887 is an apocalyptic number.

11147385887 is a deficient number, since it is larger than the sum of its proper divisors (1013398729).

11147385887 is a wasteful number, since it uses less digits than its factorization.

11147385887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013398728.

The product of its digits is 1505280, while the sum is 53.

The spelling of 11147385887 in words is "eleven billion, one hundred forty-seven million, three hundred eighty-five thousand, eight hundred eighty-seven".