1611166165156 has 6 divisors (see below), whose sum is σ = 2819540789030. Its totient is φ = 805583082576.

The previous prime is 1611166165121. The next prime is 1611166165183. The reversal of 1611166165156 is 6515616611161.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1552715366400 + 58450798756 = 1246080^2 + 241766^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201395770641 + ... + 201395770648.

Almost surely, 2^{1611166165156} is an apocalyptic number.

It is an amenable number.

1611166165156 is a deficient number, since it is larger than the sum of its proper divisors (1208374623874).

1611166165156 is a wasteful number, since it uses less digits than its factorization.

1611166165156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402791541293 (or 402791541291 counting only the distinct ones).

The product of its digits is 194400, while the sum is 46.

The spelling of 1611166165156 in words is "one trillion, six hundred eleven billion, one hundred sixty-six million, one hundred sixty-five thousand, one hundred fifty-six".