1156506566 has 16 divisors (see below), whose sum is σ = 1846332144. Its totient is φ = 541415424.

The previous prime is 1156506541. The next prime is 1156506569. The reversal of 1156506566 is 6656056511.

It is a super-2 number, since 2×1156506566² = 2675014874402224712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156506569) by changing a digit.

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, 81560 + ... + 94683.

It is an arithmetic number, because the mean of its divisors is an integer number (115395759).

Almost surely, 2^1156506566 is an apocalyptic number.

1156506566 is a deficient number, since it is larger than the sum of its proper divisors (689825578).

1156506566 is a wasteful number, since it uses less digits than its factorization.

1156506566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176455.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 1156506566 is about 34007.4486840751. The cubic root of 1156506566 is about 1049.6617401713.

The spelling of 1156506566 in words is "one billion, one hundred fifty-six million, five hundred six thousand, five hundred sixty-six".