556156961 has 12 divisors (see below), whose sum is σ = 588009492. Its totient is φ = 525952224.

The previous prime is 556156933. The next prime is 556156967. The reversal of 556156961 is 169651655.

It can be written as a sum of positive squares in 2 ways, for example, as 325116961 + 231040000 = 18031^2 + 15200^2 .

It is not a de Polignac number, because 556156961 - 2¹⁴ = 556140577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (556156967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 286751 + ... + 288683.

It is an arithmetic number, because the mean of its divisors is an integer number (49000791).

Almost surely, 2^556156961 is an apocalyptic number.

It is an amenable number.

556156961 is a deficient number, since it is larger than the sum of its proper divisors (31852531).

556156961 is a wasteful number, since it uses less digits than its factorization.

556156961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2768 (or 2749 counting only the distinct ones).

The product of its digits is 243000, while the sum is 44.

The square root of 556156961 is about 23582.9803248020. The cubic root of 556156961 is about 822.3672231415.

The spelling of 556156961 in words is "five hundred fifty-six million, one hundred fifty-six thousand, nine hundred sixty-one".