1129668156 has 72 divisors (see below), whose sum is σ = 3053048544. Its totient is φ = 350945280.

The previous prime is 1129668143. The next prime is 1129668157. The reversal of 1129668156 is 6518669211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129668157) 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, 54076 + ... + 71996.

It is an arithmetic number, because the mean of its divisors is an integer number (42403452).

Almost surely, 2^1129668156 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 1129668156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1526524272).

1129668156 is an abundant number, since it is smaller than the sum of its proper divisors (1923380388).

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

1129668156 is a wasteful number, since it uses less digits than its factorization.

1129668156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18051 (or 18046 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 1129668156 is about 33610.5363836997. The cubic root of 1129668156 is about 1041.4784679677.

The spelling of 1129668156 in words is "one billion, one hundred twenty-nine million, six hundred sixty-eight thousand, one hundred fifty-six".