1161780116 has 48 divisors (see below), whose sum is σ = 2346900864. Its totient is φ = 492932736.

The previous prime is 1161780091. The next prime is 1161780127. The reversal of 1161780116 is 6110871611.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1806491 + ... + 1807133.

It is an arithmetic number, because the mean of its divisors is an integer number (48893768).

Almost surely, 2^1161780116 is an apocalyptic number.

It is an amenable number.

1161780116 is an abundant number, since it is smaller than the sum of its proper divisors (1185120748).

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

1161780116 is a wasteful number, since it uses less digits than its factorization.

1161780116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200 (or 1198 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 32.

The square root of 1161780116 is about 34084.8957164313. The cubic root of 1161780116 is about 1051.2547708261.

The spelling of 1161780116 in words is "one billion, one hundred sixty-one million, seven hundred eighty thousand, one hundred sixteen".