1161555303 has 16 divisors (see below), whose sum is σ = 1555733376. Its totient is φ = 770883360.

The previous prime is 1161555293. The next prime is 1161555323. The reversal of 1161555303 is 3035551611.

It is not a de Polignac number, because 1161555303 - 2¹⁰ = 1161554279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161555323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 899088 + ... + 900378.

It is an arithmetic number, because the mean of its divisors is an integer number (97233336).

Almost surely, 2^1161555303 is an apocalyptic number.

1161555303 is a deficient number, since it is larger than the sum of its proper divisors (394178073).

1161555303 is a wasteful number, since it uses less digits than its factorization.

1161555303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2414.

The product of its (nonzero) digits is 6750, while the sum is 30.

The square root of 1161555303 is about 34081.5977178301. The cubic root of 1161555303 is about 1051.1869579410.

The spelling of 1161555303 in words is "one billion, one hundred sixty-one million, five hundred fifty-five thousand, three hundred three".