556510611161 has 4 divisors (see below), whose sum is σ = 556513081524. Its totient is φ = 556508140800.

The previous prime is 556510611131. The next prime is 556510611193. The reversal of 556510611161 is 161116015655.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 372503929561 + 184006681600 = 610331^2 + 428960^2 .

It is a cyclic number.

It is not a de Polignac number, because 556510611161 - 2²⁶ = 556443502297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556510611131) 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 3 ways as a sum of consecutive naturals, for example, 859100 + ... + 1360541.

It is an arithmetic number, because the mean of its divisors is an integer number (139128270381).

Almost surely, 2^556510611161 is an apocalyptic number.

It is an amenable number.

556510611161 is a deficient number, since it is larger than the sum of its proper divisors (2470363).

556510611161 is a wasteful number, since it uses less digits than its factorization.

556510611161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2470362.

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 556510611161 in words is "five hundred fifty-six billion, five hundred ten million, six hundred eleven thousand, one hundred sixty-one".