1161322160 has 20 divisors (see below), whose sum is σ = 2700074208. Its totient is φ = 464528832.

The previous prime is 1161322147. The next prime is 1161322231. The reversal of 1161322160 is 612231611.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7258184 + ... + 7258343.

Almost surely, 2^1161322160 is an apocalyptic number.

1161322160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161322160 is an abundant number, since it is smaller than the sum of its proper divisors (1538752048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1161322160 is a wasteful number, since it uses less digits than its factorization.

1161322160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14516540 (or 14516534 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1161322160 is about 34078.1771812989. The cubic root of 1161322160 is about 1051.1166231410.

Adding to 1161322160 its reverse (612231611), we get a palindrome (1773553771).

The spelling of 1161322160 in words is "one billion, one hundred sixty-one million, three hundred twenty-two thousand, one hundred sixty".