57185661605 has 4 divisors (see below), whose sum is σ = 68622793932. Its totient is φ = 45748529280.

The previous prime is 57185661593. The next prime is 57185661613. The reversal of 57185661605 is 50616658175.

57185661605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32034556324 + 25151105281 = 178982^2 + 158591^2 .

It is not a de Polignac number, because 57185661605 - 2¹⁴ = 57185645221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5718566156 + ... + 5718566165.

It is an arithmetic number, because the mean of its divisors is an integer number (17155698483).

Almost surely, 2^57185661605 is an apocalyptic number.

It is an amenable number.

57185661605 is a deficient number, since it is larger than the sum of its proper divisors (11437132327).

57185661605 is a wasteful number, since it uses less digits than its factorization.

57185661605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11437132326.

The product of its (nonzero) digits is 1512000, while the sum is 50.

The spelling of 57185661605 in words is "fifty-seven billion, one hundred eighty-five million, six hundred sixty-one thousand, six hundred five".