1159786855 has 4 divisors (see below), whose sum is σ = 1391744232. Its totient is φ = 927829480.

The previous prime is 1159786853. The next prime is 1159786861. The reversal of 1159786855 is 5586879511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5586879511 = 22637 ⋅246803.

It is not a de Polignac number, because 1159786855 - 2¹ = 1159786853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1159786796 and 1159786805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1159786853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115978681 + ... + 115978690.

It is an arithmetic number, because the mean of its divisors is an integer number (347936058).

Almost surely, 2^1159786855 is an apocalyptic number.

1159786855 is a deficient number, since it is larger than the sum of its proper divisors (231957377).

1159786855 is an equidigital number, since it uses as much as digits as its factorization.

1159786855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231957376.

The product of its digits is 3024000, while the sum is 55.

The square root of 1159786855 is about 34055.6435117588. The cubic root of 1159786855 is about 1050.6532156147.

The spelling of 1159786855 in words is "one billion, one hundred fifty-nine million, seven hundred eighty-six thousand, eight hundred fifty-five".