2049145866 has 12 divisors (see below), whose sum is σ = 4439816082. Its totient is φ = 683048616.

The previous prime is 2049145859. The next prime is 2049145871. The reversal of 2049145866 is 6685419402.

2049145866 is a `hidden beast` number, since 20 + 49 + 1 + 4 + 586 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1654130241 + 395015625 = 40671^2 + 19875^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56920701 + ... + 56920736.

Almost surely, 2^2049145866 is an apocalyptic number.

2049145866 is an abundant number, since it is smaller than the sum of its proper divisors (2390670216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2049145866 is a wasteful number, since it uses less digits than its factorization.

2049145866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113841445 (or 113841442 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 2049145866 is about 45267.4923758761. The cubic root of 2049145866 is about 1270.1576397207.

The spelling of 2049145866 in words is "two billion, forty-nine million, one hundred forty-five thousand, eight hundred sixty-six".