1161085455 has 16 divisors (see below), whose sum is σ = 2064152160. Its totient is φ = 619245504.

The previous prime is 1161085447. The next prime is 1161085477. The reversal of 1161085455 is 5545801611.

1161085455 is a `hidden beast` number, since 1 + 1 + 6 + 108 + 545 + 5 = 666.

It is not a de Polignac number, because 1161085455 - 2³ = 1161085447 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4300182 + ... + 4300451.

It is an arithmetic number, because the mean of its divisors is an integer number (129009510).

Almost surely, 2^1161085455 is an apocalyptic number.

1161085455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1161085455 is a deficient number, since it is larger than the sum of its proper divisors (903066705).

1161085455 is an equidigital number, since it uses as much as digits as its factorization.

1161085455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8600647 (or 8600641 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 36.

The square root of 1161085455 is about 34074.7040339311. The cubic root of 1161085455 is about 1051.0452041226.

The spelling of 1161085455 in words is "one billion, one hundred sixty-one million, eighty-five thousand, four hundred fifty-five".