549566318138 has 8 divisors (see below), whose sum is σ = 835960033440. Its totient is φ = 270912973660.

The previous prime is 549566318137. The next prime is 549566318153. The reversal of 549566318138 is 831813665945.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (549566318137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1935092528 + ... + 1935092811.

It is an arithmetic number, because the mean of its divisors is an integer number (104495004180).

Almost surely, 2^549566318138 is an apocalyptic number.

549566318138 is a deficient number, since it is larger than the sum of its proper divisors (286393715302).

549566318138 is a wasteful number, since it uses less digits than its factorization.

549566318138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3870185412.

The product of its digits is 18662400, while the sum is 59.

The spelling of 549566318138 in words is "five hundred forty-nine billion, five hundred sixty-six million, three hundred eighteen thousand, one hundred thirty-eight".