1149256566 has 16 divisors (see below), whose sum is σ = 2553903600. Its totient is φ = 383085504.

The previous prime is 1149256541. The next prime is 1149256567. The reversal of 1149256566 is 6656529411.

It is a super-2 number, since 2×1149256566² = 2641581308988224712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1149256567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10641211 + ... + 10641318.

It is an arithmetic number, because the mean of its divisors is an integer number (159618975).

Almost surely, 2^1149256566 is an apocalyptic number.

1149256566 is an abundant number, since it is smaller than the sum of its proper divisors (1404647034).

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

1149256566 is a wasteful number, since it uses less digits than its factorization.

1149256566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21282540 (or 21282534 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 1149256566 is about 33900.6868072020. The cubic root of 1149256566 is about 1047.4637398567.

The spelling of 1149256566 in words is "one billion, one hundred forty-nine million, two hundred fifty-six thousand, five hundred sixty-six".