1161339816 has 256 divisors, whose sum is σ = 3715891200. Its totient is φ = 294368256.

The previous prime is 1161339799. The next prime is 1161339827. The reversal of 1161339816 is 6189331611.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

Its product of digits (23328) is a multiple of the sum of its prime factors (288).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9144345 + ... + 9144471.

It is an arithmetic number, because the mean of its divisors is an integer number (14515200).

Almost surely, 2^1161339816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161339816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1857945600).

1161339816 is an abundant number, since it is smaller than the sum of its proper divisors (2554551384).

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

1161339816 is a wasteful number, since it uses less digits than its factorization.

1161339816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 284 counting only the distinct ones).

The product of its digits is 23328, while the sum is 39.

The square root of 1161339816 is about 34078.4362317287. The cubic root of 1161339816 is about 1051.1219499492.

The spelling of 1161339816 in words is "one billion, one hundred sixty-one million, three hundred thirty-nine thousand, eight hundred sixteen".