2104550799849 has 81 divisors (see below), whose sum is σ = 3319198263927. Its totient is φ = 1284746119200.

The previous prime is 2104550799823. The next prime is 2104550799929. The reversal of 2104550799849 is 9489970554012.

The square root of 2104550799849 is 1450707.

It is a perfect power (a square), and thus also a powerful number.

2104550799849 is a `hidden beast` number, since 2 + 1 + 0 + 4 + 550 + 79 + 9 + 8 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 574629189849 + 1529921610000 = 758043^2 + 1236900^2 .

It is not a de Polignac number, because 2104550799849 - 2³⁷ = 1967111846377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2104550799149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2563398859 + ... + 2563399679.

Almost surely, 2^{2104550799849} is an apocalyptic number.

2104550799849 is the 1450707-th square number.

2104550799849 is the 725354-th centered octagonal number.

It is an amenable number.

2104550799849 is a deficient number, since it is larger than the sum of its proper divisors (1214647464078).

2104550799849 is an frugal number, since it uses more digits than its factorization.

2104550799849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748 (or 874 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 63.

The spelling of 2104550799849 in words is "two trillion, one hundred four billion, five hundred fifty million, seven hundred ninety-nine thousand, eight hundred forty-nine".