1161012566 has 48 divisors (see below), whose sum is σ = 2092356000. Its totient is φ = 481396608.

The previous prime is 1161012563. The next prime is 1161012571. The reversal of 1161012566 is 6652101611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161012563) 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, 720770 + ... + 722378.

It is an arithmetic number, because the mean of its divisors is an integer number (43590750).

Almost surely, 2^1161012566 is an apocalyptic number.

1161012566 is a deficient number, since it is larger than the sum of its proper divisors (931343434).

1161012566 is a wasteful number, since it uses less digits than its factorization.

1161012566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861 (or 1854 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1161012566 is about 34073.6344700708. The cubic root of 1161012566 is about 1051.0232099800.

The spelling of 1161012566 in words is "one billion, one hundred sixty-one million, twelve thousand, five hundred sixty-six".