1561064617171 has 8 divisors (see below), whose sum is σ = 1576810985984. Its totient is φ = 1545329602440.

The previous prime is 1561064617169. The next prime is 1561064617187. The reversal of 1561064617171 is 1717164601651.

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 1561064617171 - 2¹ = 1561064617169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1561064617771) 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, 2562021 + ... + 3112246.

It is an arithmetic number, because the mean of its divisors is an integer number (197101373248).

Almost surely, 2^{1561064617171} is an apocalyptic number.

1561064617171 is a deficient number, since it is larger than the sum of its proper divisors (15746368813).

1561064617171 is a wasteful number, since it uses less digits than its factorization.

1561064617171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5677041.

The product of its (nonzero) digits is 211680, while the sum is 46.

The spelling of 1561064617171 in words is "one trillion, five hundred sixty-one billion, sixty-four million, six hundred seventeen thousand, one hundred seventy-one".