1156555166 has 16 divisors (see below), whose sum is σ = 1870434384. Its totient is φ = 533179584.

The previous prime is 1156555123. The next prime is 1156555193. The reversal of 1156555166 is 6615556511.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 2231 + ... + 48146.

It is an arithmetic number, because the mean of its divisors is an integer number (116902149).

Almost surely, 2^1156555166 is an apocalyptic number.

1156555166 is a deficient number, since it is larger than the sum of its proper divisors (713879218).

1156555166 is a wasteful number, since it uses less digits than its factorization.

1156555166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51275.

The product of its digits is 135000, while the sum is 41.

The square root of 1156555166 is about 34008.1632259080. The cubic root of 1156555166 is about 1049.6764433148.

The spelling of 1156555166 in words is "one billion, one hundred fifty-six million, five hundred fifty-five thousand, one hundred sixty-six".