2171616161571 has 12 divisors (see below), whose sum is σ = 3136811411448. Its totient is φ = 1447729102464.

The previous prime is 2171616161443. The next prime is 2171616161579. The reversal of 2171616161571 is 1751616161712.

2171616161571 is a `hidden beast` number, since 2 + 1 + 7 + 1 + 6 + 16 + 1 + 61 + 571 = 666.

It is not a de Polignac number, because 2171616161571 - 2⁷ = 2171616161443 is a prime.

It is a super-3 number, since 3×2171616161571³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2171616161579) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 295470 + ... + 2104883.

It is an arithmetic number, because the mean of its divisors is an integer number (261400950954).

Almost surely, 2^{2171616161571} is an apocalyptic number.

2171616161571 is a deficient number, since it is larger than the sum of its proper divisors (965195249877).

2171616161571 is a wasteful number, since it uses less digits than its factorization.

2171616161571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500882 (or 2500879 counting only the distinct ones).

The product of its digits is 105840, while the sum is 45.

The spelling of 2171616161571 in words is "two trillion, one hundred seventy-one billion, six hundred sixteen million, one hundred sixty-one thousand, five hundred seventy-one".