1161959616 has 84 divisors (see below), whose sum is σ = 3338506912. Its totient is φ = 386394624.

The previous prime is 1161959587. The next prime is 1161959641. The reversal of 1161959616 is 6169591611.

1161959616 is a `hidden beast` number, since 1 + 16 + 19 + 5 + 9 + 616 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 264510 + ... + 268866.

Almost surely, 2^1161959616 is an apocalyptic number.

1161959616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161959616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1669253456).

1161959616 is an abundant number, since it is smaller than the sum of its proper divisors (2176547296).

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

1161959616 is a wasteful number, since it uses less digits than its factorization.

1161959616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4838 (or 4825 counting only the distinct ones).

The product of its digits is 87480, while the sum is 45.

The square root of 1161959616 is about 34087.5287458625. The cubic root of 1161959616 is about 1051.3089091584.

The spelling of 1161959616 in words is "one billion, one hundred sixty-one million, nine hundred fifty-nine thousand, six hundred sixteen".