1165580946 has 12 divisors (see below), whose sum is σ = 2525425422. Its totient is φ = 388526976.

The previous prime is 1165580921. The next prime is 1165580947. The reversal of 1165580946 is 6490855611.

1165580946 is a `hidden beast` number, since 1 + 1 + 6 + 558 + 0 + 94 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1076561721 + 89019225 = 32811^2 + 9435^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1165580947) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32377231 + ... + 32377266.

Almost surely, 2^1165580946 is an apocalyptic number.

1165580946 is an abundant number, since it is smaller than the sum of its proper divisors (1359844476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1165580946 is a wasteful number, since it uses less digits than its factorization.

1165580946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64754505 (or 64754502 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 1165580946 is about 34140.6055306581. The cubic root of 1165580946 is about 1052.3999362482.

The spelling of 1165580946 in words is "one billion, one hundred sixty-five million, five hundred eighty thousand, nine hundred forty-six".