1161594553 has 8 divisors (see below), whose sum is σ = 1385255808. Its totient is φ = 952363104.

The previous prime is 1161594541. The next prime is 1161594557. The reversal of 1161594553 is 3554951611.

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

It is not a de Polignac number, because 1161594553 - 2⁹ = 1161594041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161594557) 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, 3607276 + ... + 3607597.

It is an arithmetic number, because the mean of its divisors is an integer number (173156976).

Almost surely, 2^1161594553 is an apocalyptic number.

It is an amenable number.

1161594553 is a deficient number, since it is larger than the sum of its proper divisors (223661255).

1161594553 is an equidigital number, since it uses as much as digits as its factorization.

1161594553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7214903.

The product of its digits is 81000, while the sum is 40.

The square root of 1161594553 is about 34082.1735369093. The cubic root of 1161594553 is about 1051.1987979924.

The spelling of 1161594553 in words is "one billion, one hundred sixty-one million, five hundred ninety-four thousand, five hundred fifty-three".