1161166512 has 40 divisors (see below), whose sum is σ = 3272379840. Its totient is φ = 351868480.

The previous prime is 1161166511. The next prime is 1161166519. The reversal of 1161166512 is 2156611611.

It is a super-2 number, since 2×1161166512² = 2696615337180492288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1161166512.

It is not an unprimeable number, because it can be changed into a prime (1161166511) 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, 1099062 + ... + 1100117.

It is an arithmetic number, because the mean of its divisors is an integer number (81809496).

Almost surely, 2^1161166512 is an apocalyptic number.

1161166512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1161166512 is an abundant number, since it is smaller than the sum of its proper divisors (2111213328).

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

1161166512 is a wasteful number, since it uses less digits than its factorization.

1161166512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2199201 (or 2199195 counting only the distinct ones).

The product of its digits is 2160, while the sum is 30.

The square root of 1161166512 is about 34075.8934145533. The cubic root of 1161166512 is about 1051.0696618655.

It can be divided in two parts, 116 and 1166512, that added together give a triangular number (1166628 = T₁₅₂₇).

The spelling of 1161166512 in words is "one billion, one hundred sixty-one million, one hundred sixty-six thousand, five hundred twelve".