2160534256661 has 8 divisors (see below), whose sum is σ = 2367238807200. Its totient is φ = 1955545097040.

The previous prime is 2160534256619. The next prime is 2160534256703. The reversal of 2160534256661 is 1666524350612.

It is an interprime number because it is at equal distance from previous prime (2160534256619) and next prime (2160534256703).

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 2160534256661 - 2³⁰ = 2159460514837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2160534256961) 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, 428845091 + ... + 428850128.

It is an arithmetic number, because the mean of its divisors is an integer number (295904850900).

Almost surely, 2^{2160534256661} is an apocalyptic number.

It is an amenable number.

2160534256661 is a deficient number, since it is larger than the sum of its proper divisors (206704550539).

2160534256661 is a wasteful number, since it uses less digits than its factorization.

2160534256661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857695459.

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 2160534256661 in words is "two trillion, one hundred sixty billion, five hundred thirty-four million, two hundred fifty-six thousand, six hundred sixty-one".