1158189856 has 12 divisors (see below), whose sum is σ = 2280186342. Its totient is φ = 579094912.

The previous prime is 1158189833. The next prime is 1158189871. The reversal of 1158189856 is 6589818511.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1154640400 + 3549456 = 33980^2 + 1884^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18096685 + ... + 18096748.

Almost surely, 2^1158189856 is an apocalyptic number.

1158189856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1158189856 is a deficient number, since it is larger than the sum of its proper divisors (1121996486).

1158189856 is an equidigital number, since it uses as much as digits as its factorization.

1158189856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36193443 (or 36193435 counting only the distinct ones).

The product of its digits is 691200, while the sum is 52.

The square root of 1158189856 is about 34032.1885279216. The cubic root of 1158189856 is about 1050.1707525781.

The spelling of 1158189856 in words is "one billion, one hundred fifty-eight million, one hundred eighty-nine thousand, eight hundred fifty-six".