1101661161 has 8 divisors (see below), whose sum is σ = 1503041760. Its totient is φ = 717360672.

The previous prime is 1101661139. The next prime is 1101661163. The reversal of 1101661161 is 1611661011.

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

It is a de Polignac number, because none of the positive numbers 2^k-1101661161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1101661163) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4269876 + ... + 4270133.

It is an arithmetic number, because the mean of its divisors is an integer number (187880220).

Almost surely, 2^1101661161 is an apocalyptic number.

It is an amenable number.

1101661161 is a deficient number, since it is larger than the sum of its proper divisors (401380599).

1101661161 is an equidigital number, since it uses as much as digits as its factorization.

1101661161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8540055.

The product of its (nonzero) digits is 216, while the sum is 24.

The square root of 1101661161 is about 33191.2814003919. The cubic root of 1101661161 is about 1032.7994854567.

The spelling of 1101661161 in words is "one billion, one hundred one million, six hundred sixty-one thousand, one hundred sixty-one".