1155340566 has 12 divisors (see below), whose sum is σ = 2503237932. Its totient is φ = 385113516.

The previous prime is 1155340561. The next prime is 1155340633. The reversal of 1155340566 is 6650435511.

1155340566 is a `hidden beast` number, since 1 + 1 + 5 + 53 + 40 + 566 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1155340566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155340561) 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, 32092776 + ... + 32092811.

It is an arithmetic number, because the mean of its divisors is an integer number (208603161).

Almost surely, 2^1155340566 is an apocalyptic number.

1155340566 is an abundant number, since it is smaller than the sum of its proper divisors (1347897366).

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

1155340566 is a wasteful number, since it uses less digits than its factorization.

1155340566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64185595 (or 64185592 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 1155340566 is about 33990.3010578018. The cubic root of 1155340566 is about 1049.3088621814.

The spelling of 1155340566 in words is "one billion, one hundred fifty-five million, three hundred forty thousand, five hundred sixty-six".