1155566061 has 24 divisors (see below), whose sum is σ = 1853775360. Its totient is φ = 711114768.

The previous prime is 1155566053. The next prime is 1155566119. The reversal of 1155566061 is 1606655511.

It is not a de Polignac number, because 1155566061 - 2³ = 1155566053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155566011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122061 + ... + 131186.

It is an arithmetic number, because the mean of its divisors is an integer number (77240640).

Almost surely, 2^1155566061 is an apocalyptic number.

It is an amenable number.

1155566061 is a deficient number, since it is larger than the sum of its proper divisors (698209299).

1155566061 is a wasteful number, since it uses less digits than its factorization.

1155566061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253282 (or 253263 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1155566061 is about 33993.6179451379. The cubic root of 1155566061 is about 1049.3771244516.

The spelling of 1155566061 in words is "one billion, one hundred fifty-five million, five hundred sixty-six thousand, sixty-one".