1617170085541 has 4 divisors (see below), whose sum is σ = 1617189175372. Its totient is φ = 1617150995712.

The previous prime is 1617170085491. The next prime is 1617170085593. The reversal of 1617170085541 is 1455800717161.

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 281169304516 + 1336000781025 = 530254^2 + 1155855^2 .

It is a cyclic number.

It is not a de Polignac number, because 1617170085541 - 2²¹ = 1617167988389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1617170085491 and 1617170085500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1617170055541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9417276 + ... + 9587461.

It is an arithmetic number, because the mean of its divisors is an integer number (404297293843).

Almost surely, 2^{1617170085541} is an apocalyptic number.

It is an amenable number.

1617170085541 is a deficient number, since it is larger than the sum of its proper divisors (19089831).

1617170085541 is an equidigital number, since it uses as much as digits as its factorization.

1617170085541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19089830.

The product of its (nonzero) digits is 235200, while the sum is 46.

The spelling of 1617170085541 in words is "one trillion, six hundred seventeen billion, one hundred seventy million, eighty-five thousand, five hundred forty-one".