1161578882 has 4 divisors (see below), whose sum is σ = 1742368326. Its totient is φ = 580789440.

The previous prime is 1161578849. The next prime is 1161578893. The reversal of 1161578882 is 2888751611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 600789121 + 560789761 = 24511^2 + 23681^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290394719 + ... + 290394722.

Almost surely, 2^1161578882 is an apocalyptic number.

1161578882 is a deficient number, since it is larger than the sum of its proper divisors (580789444).

1161578882 is an equidigital number, since it uses as much as digits as its factorization.

1161578882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580789443.

The product of its digits is 215040, while the sum is 47.

The square root of 1161578882 is about 34081.9436358903. The cubic root of 1161578882 is about 1051.1940707519.

The spelling of 1161578882 in words is "one billion, one hundred sixty-one million, five hundred seventy-eight thousand, eight hundred eighty-two".