1158815543 has 8 divisors (see below), whose sum is σ = 1190571312. Its totient is φ = 1127082816.

The previous prime is 1158815533. The next prime is 1158815561. The reversal of 1158815543 is 3455188511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1158815543 - 2¹⁸ = 1158553399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1158815543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158815533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161396 + ... + 168422.

It is an arithmetic number, because the mean of its divisors is an integer number (148821414).

Almost surely, 2^1158815543 is an apocalyptic number.

1158815543 is a deficient number, since it is larger than the sum of its proper divisors (31755769).

1158815543 is an equidigital number, since it uses as much as digits as its factorization.

1158815543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11521.

The product of its digits is 96000, while the sum is 41.

The square root of 1158815543 is about 34041.3798633369. The cubic root of 1158815543 is about 1050.3598292066.

The spelling of 1158815543 in words is "one billion, one hundred fifty-eight million, eight hundred fifteen thousand, five hundred forty-three".