509671127656 has 32 divisors (see below), whose sum is σ = 1011971343240. Its totient is φ = 239815784448.

The previous prime is 509671127573. The next prime is 509671127657. The reversal of 509671127656 is 656721176905.

It can be written as a sum of positive squares in 4 ways, for example, as 390462516900 + 119208610756 = 624870^2 + 345266^2 .

It is a super-2 number, since 2×509671127656² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 509671127597 and 509671127606.

It is not an unprimeable number, because it can be changed into a prime (509671127657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 901900 + ... + 1353796.

Almost surely, 2^509671127656 is an apocalyptic number.

It is an amenable number.

509671127656 is a deficient number, since it is larger than the sum of its proper divisors (502300215584).

509671127656 is a wasteful number, since it uses less digits than its factorization.

509671127656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460213 (or 460209 counting only the distinct ones).

The product of its (nonzero) digits is 4762800, while the sum is 55.

The spelling of 509671127656 in words is "five hundred nine billion, six hundred seventy-one million, one hundred twenty-seven thousand, six hundred fifty-six".