1138181547 has 8 divisors (see below), whose sum is σ = 1519289856. Its totient is φ = 757930472.

The previous prime is 1138181543. The next prime is 1138181549. The reversal of 1138181547 is 7451818311.

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

It is a cyclic number.

It is not a de Polignac number, because 1138181547 - 2² = 1138181543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1138181543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211203 + ... + 216524.

It is an arithmetic number, because the mean of its divisors is an integer number (189911232).

Almost surely, 2^1138181547 is an apocalyptic number.

1138181547 is a deficient number, since it is larger than the sum of its proper divisors (381108309).

1138181547 is an equidigital number, since it uses as much as digits as its factorization.

1138181547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428617.

The product of its digits is 26880, while the sum is 39.

The square root of 1138181547 is about 33736.9463200213. The cubic root of 1138181547 is about 1044.0881821332.

Adding to 1138181547 its reverse (7451818311), we get a palindrome (8589999858).

The spelling of 1138181547 in words is "one billion, one hundred thirty-eight million, one hundred eighty-one thousand, five hundred forty-seven".