161113785 has 32 divisors (see below), whose sum is σ = 298352640. Its totient is φ = 72715968.

The previous prime is 161113739. The next prime is 161113817. The reversal of 161113785 is 587311161.

It is not a de Polignac number, because 161113785 - 2⁶ = 161113721 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1417 + ... + 18006.

It is an arithmetic number, because the mean of its divisors is an integer number (9323520).

Almost surely, 2^161113785 is an apocalyptic number.

161113785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161113785 is a deficient number, since it is larger than the sum of its proper divisors (137238855).

161113785 is a wasteful number, since it uses less digits than its factorization.

161113785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19517.

The product of its digits is 5040, while the sum is 33.

The square root of 161113785 is about 12693.0605056464. The cubic root of 161113785 is about 544.1403105941.

The spelling of 161113785 in words is "one hundred sixty-one million, one hundred thirteen thousand, seven hundred eighty-five".