2181774905092 has 12 divisors (see below), whose sum is σ = 3820473178956. Its totient is φ = 1090211139680.

The previous prime is 2181774905041. The next prime is 2181774905113. The reversal of 2181774905092 is 2905094771812.

It can be written as a sum of positive squares in 2 ways, for example, as 1383314708736 + 798460196356 = 1176144^2 + 893566^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169070959 + ... + 169083862.

It is an arithmetic number, because the mean of its divisors is an integer number (318372764913).

Almost surely, 2^{2181774905092} is an apocalyptic number.

It is an amenable number.

2181774905092 is a deficient number, since it is larger than the sum of its proper divisors (1638698273864).

2181774905092 is a wasteful number, since it uses less digits than its factorization.

2181774905092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338156438 (or 338156436 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 55.

The spelling of 2181774905092 in words is "two trillion, one hundred eighty-one billion, seven hundred seventy-four million, nine hundred five thousand, ninety-two".