2173027945761 has 6 divisors (see below), whose sum is σ = 3138818143890. Its totient is φ = 1448685297168.

The previous prime is 2173027945747. The next prime is 2173027945763. The reversal of 2173027945761 is 1675497203712.

2173027945761 is a `hidden beast` number, since 2 + 17 + 30 + 27 + 9 + 4 + 576 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2172381210000 + 646735761 = 1473900^2 + 25431^2 .

It is not a de Polignac number, because 2173027945761 - 2²⁶ = 2172960836897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2173027945698 and 2173027945707.

It is not an unprimeable number, because it can be changed into a prime (2173027945763) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 120723774756 + ... + 120723774773.

It is an arithmetic number, because the mean of its divisors is an integer number (523136357315).

Almost surely, 2^{2173027945761} is an apocalyptic number.

It is an amenable number.

2173027945761 is a deficient number, since it is larger than the sum of its proper divisors (965790198129).

2173027945761 is a wasteful number, since it uses less digits than its factorization.

2173027945761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241447549535 (or 241447549532 counting only the distinct ones).

The product of its (nonzero) digits is 4445280, while the sum is 54.

The spelling of 2173027945761 in words is "two trillion, one hundred seventy-three billion, twenty-seven million, nine hundred forty-five thousand, seven hundred sixty-one".