61171385 has 16 divisors (see below), whose sum is σ = 82035072. Its totient is φ = 43401600.

The previous prime is 61171361. The next prime is 61171403. The reversal of 61171385 is 58317116.

It is not a de Polignac number, because 61171385 - 2²⁰ = 60122809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11309 + ... + 15818.

It is an arithmetic number, because the mean of its divisors is an integer number (5127192).

Almost surely, 2^61171385 is an apocalyptic number.

It is an amenable number.

61171385 is a deficient number, since it is larger than the sum of its proper divisors (20863687).

61171385 is a wasteful number, since it uses less digits than its factorization.

61171385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27184.

The product of its digits is 5040, while the sum is 32.

The square root of 61171385 is about 7821.2137804819. The cubic root of 61171385 is about 394.0180383747.

The spelling of 61171385 in words is "sixty-one million, one hundred seventy-one thousand, three hundred eighty-five".