1161656659 has 8 divisors (see below), whose sum is σ = 1172299328. Its totient is φ = 1151055360.

The previous prime is 1161656647. The next prime is 1161656669. The reversal of 1161656659 is 9566561611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1161656659 - 2⁵ = 1161656627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161656669) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 47539 + ... + 67699.

It is an arithmetic number, because the mean of its divisors is an integer number (146537416).

Almost surely, 2^1161656659 is an apocalyptic number.

1161656659 is a deficient number, since it is larger than the sum of its proper divisors (10642669).

1161656659 is a wasteful number, since it uses less digits than its factorization.

1161656659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20685.

The product of its digits is 291600, while the sum is 46.

The square root of 1161656659 is about 34083.0846461995. The cubic root of 1161656659 is about 1051.2175321795.

The spelling of 1161656659 in words is "one billion, one hundred sixty-one million, six hundred fifty-six thousand, six hundred fifty-nine".