1161811712 has 36 divisors (see below), whose sum is σ = 2321329920. Its totient is φ = 580343808.

The previous prime is 1161811709. The next prime is 1161811727. The reversal of 1161811712 is 2171181611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424364 + ... + 427092.

Almost surely, 2^1161811712 is an apocalyptic number.

It is an amenable number.

1161811712 is a deficient number, since it is larger than the sum of its proper divisors (1159518208).

1161811712 is an equidigital number, since it uses as much as digits as its factorization.

1161811712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4408 (or 4394 counting only the distinct ones).

The product of its digits is 672, while the sum is 29.

The square root of 1161811712 is about 34085.3592030361. The cubic root of 1161811712 is about 1051.2643007834.

The spelling of 1161811712 in words is "one billion, one hundred sixty-one million, eight hundred eleven thousand, seven hundred twelve".