2100444044549 has 4 divisors (see below), whose sum is σ = 2100457102380. Its totient is φ = 2100430986720.

The previous prime is 2100444044533. The next prime is 2100444044609. The reversal of 2100444044549 is 9454404440012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 652710489025 + 1447733555524 = 807905^2 + 1203218^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100444044549 - 2⁴ = 2100444044533 is a prime.

It is a super-2 number, since 2×2100444044549² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100444044519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6284582 + ... + 6610359.

It is an arithmetic number, because the mean of its divisors is an integer number (525114275595).

Almost surely, 2^{2100444044549} is an apocalyptic number.

It is an amenable number.

2100444044549 is a deficient number, since it is larger than the sum of its proper divisors (13057831).

2100444044549 is a wasteful number, since it uses less digits than its factorization.

2100444044549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13057830.

The product of its (nonzero) digits is 368640, while the sum is 41.

The spelling of 2100444044549 in words is "two trillion, one hundred billion, four hundred forty-four million, forty-four thousand, five hundred forty-nine".