556139161 has 4 divisors (see below), whose sum is σ = 556361424. Its totient is φ = 555916900.

The previous prime is 556139159. The next prime is 556139189. The reversal of 556139161 is 161931655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 161931655 = 5 ⋅32386331.

It is a cyclic number.

It is not a de Polignac number, because 556139161 - 2¹ = 556139159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 556139161.

It is not an unprimeable number, because it can be changed into a prime (556139261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107335 + ... + 112396.

It is an arithmetic number, because the mean of its divisors is an integer number (139090356).

Almost surely, 2^556139161 is an apocalyptic number.

It is an amenable number.

556139161 is a deficient number, since it is larger than the sum of its proper divisors (222263).

556139161 is a wasteful number, since it uses less digits than its factorization.

556139161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222262.

The product of its digits is 24300, while the sum is 37.

The square root of 556139161 is about 23582.6029309743. The cubic root of 556139161 is about 822.3584496634.

The spelling of 556139161 in words is "five hundred fifty-six million, one hundred thirty-nine thousand, one hundred sixty-one".