1571161017161 has 8 divisors (see below), whose sum is σ = 1625498745480. Its totient is φ = 1516833939712.

The previous prime is 1571161017157. The next prime is 1571161017163. The reversal of 1571161017161 is 1617101611751.

It can be written as a sum of positive squares in 4 ways, for example, as 342763411600 + 1228397605561 = 585460^2 + 1108331^2 .

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 1571161017161 - 2² = 1571161017157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1571161017163) 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, 2362010 + ... + 2953203.

It is an arithmetic number, because the mean of its divisors is an integer number (203187343185).

Almost surely, 2^{1571161017161} is an apocalyptic number.

It is an amenable number.

1571161017161 is a deficient number, since it is larger than the sum of its proper divisors (54337728319).

1571161017161 is a wasteful number, since it uses less digits than its factorization.

1571161017161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5325435.

The product of its (nonzero) digits is 8820, while the sum is 38.

The spelling of 1571161017161 in words is "one trillion, five hundred seventy-one billion, one hundred sixty-one million, seventeen thousand, one hundred sixty-one".