156600981 has 6 divisors (see below), whose sum is σ = 226201430. Its totient is φ = 104400648.

The previous prime is 156600979. The next prime is 156601009. The reversal of 156600981 is 189006651.

156600981 is a `hidden beast` number, since 1 + 566 + 0 + 0 + 98 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 154778481 + 1822500 = 12441^2 + 1350^2 .

It is not a de Polignac number, because 156600981 - 2¹ = 156600979 is a prime.

It is a super-2 number, since 2×156600981² = 49047734500324722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156600901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8700046 + ... + 8700063.

Almost surely, 2^156600981 is an apocalyptic number.

It is an amenable number.

156600981 is a deficient number, since it is larger than the sum of its proper divisors (69600449).

156600981 is a wasteful number, since it uses less digits than its factorization.

156600981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17400115 (or 17400112 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 156600981 is about 12514.0313648320. The cubic root of 156600981 is about 539.0116592606.

The spelling of 156600981 in words is "one hundred fifty-six million, six hundred thousand, nine hundred eighty-one".