549566318139 has 16 divisors (see below), whose sum is σ = 742444250400. Its totient is φ = 361549143296.

The previous prime is 549566318137. The next prime is 549566318153. The reversal of 549566318139 is 931813665945.

It is a cyclic number.

It is not a de Polignac number, because 549566318139 - 2¹ = 549566318137 is a prime.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1886004 + ... + 2157809.

It is an arithmetic number, because the mean of its divisors is an integer number (46402765650).

Almost surely, 2^549566318139 is an apocalyptic number.

549566318139 is a deficient number, since it is larger than the sum of its proper divisors (192877932261).

549566318139 is a wasteful number, since it uses less digits than its factorization.

549566318139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4044414.

The product of its digits is 20995200, while the sum is 60.

The spelling of 549566318139 in words is "five hundred forty-nine billion, five hundred sixty-six million, three hundred eighteen thousand, one hundred thirty-nine".