1605660057161 has 8 divisors (see below), whose sum is σ = 1607678440704. Its totient is φ = 1603642944240.

The previous prime is 1605660057139. The next prime is 1605660057167. The reversal of 1605660057161 is 1617500665061.

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 1605660057161 - 2²² = 1605655862857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1605660057167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2224046 + ... + 2856168.

It is an arithmetic number, because the mean of its divisors is an integer number (200959805088).

Almost surely, 2^{1605660057161} is an apocalyptic number.

It is an amenable number.

1605660057161 is a deficient number, since it is larger than the sum of its proper divisors (2018383543).

1605660057161 is a wasteful number, since it uses less digits than its factorization.

1605660057161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635311.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 1605660057161 in words is "one trillion, six hundred five billion, six hundred sixty million, fifty-seven thousand, one hundred sixty-one".