1156091855 has 8 divisors (see below), whose sum is σ = 1389271200. Its totient is φ = 923566176.

The previous prime is 1156091837. The next prime is 1156091857. The reversal of 1156091855 is 5581906511.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1156091855 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156091857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159515 + ... + 166604.

It is an arithmetic number, because the mean of its divisors is an integer number (173658900).

Almost surely, 2^1156091855 is an apocalyptic number.

1156091855 is a deficient number, since it is larger than the sum of its proper divisors (233179345).

1156091855 is an equidigital number, since it uses as much as digits as its factorization.

1156091855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326833.

The product of its (nonzero) digits is 54000, while the sum is 41.

The square root of 1156091855 is about 34001.3507819910. The cubic root of 1156091855 is about 1049.5362593122.

The spelling of 1156091855 in words is "one billion, one hundred fifty-six million, ninety-one thousand, eight hundred fifty-five".