1156641112 has 96 divisors (see below), whose sum is σ = 2607137280. Its totient is φ = 476118720.

The previous prime is 1156641091. The next prime is 1156641139. The reversal of 1156641112 is 2111466511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 729873 + ... + 731455.

It is an arithmetic number, because the mean of its divisors is an integer number (27157680).

Almost surely, 2^1156641112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1156641112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1303568640).

1156641112 is an abundant number, since it is smaller than the sum of its proper divisors (1450496168).

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

1156641112 is a wasteful number, since it uses less digits than its factorization.

1156641112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661 (or 1638 counting only the distinct ones).

The product of its digits is 1440, while the sum is 28.

The square root of 1156641112 is about 34009.4268108123. The cubic root of 1156641112 is about 1049.7024438780.

The spelling of 1156641112 in words is "one billion, one hundred fifty-six million, six hundred forty-one thousand, one hundred twelve".