556156660161 has 8 divisors (see below), whose sum is σ = 741546070560. Its totient is φ = 370769178272.

The previous prime is 556156660153. The next prime is 556156660177. The reversal of 556156660161 is 161066651655.

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 556156660161 - 2³ = 556156660153 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 556156660161.

It is not an unprimeable number, because it can be changed into a prime (556156660061) 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, 446050 + ... + 1145108.

It is an arithmetic number, because the mean of its divisors is an integer number (92693258820).

Almost surely, 2^556156660161 is an apocalyptic number.

It is an amenable number.

556156660161 is a deficient number, since it is larger than the sum of its proper divisors (185389410399).

556156660161 is a wasteful number, since it uses less digits than its factorization.

556156660161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964255.

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 556156660161 in words is "five hundred fifty-six billion, one hundred fifty-six million, six hundred sixty thousand, one hundred sixty-one".