206371451449 has 4 divisors (see below), whose sum is σ = 209869272720. Its totient is φ = 202873630180.

The previous prime is 206371451401. The next prime is 206371451459. The reversal of 206371451449 is 944154173602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 206371451449 - 2⁹ = 206371450937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206371451399 and 206371451408.

It is not an unprimeable number, because it can be changed into a prime (206371451459) 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, 1748910547 + ... + 1748910664.

It is an arithmetic number, because the mean of its divisors is an integer number (52467318180).

Almost surely, 2^206371451449 is an apocalyptic number.

It is an amenable number.

206371451449 is a deficient number, since it is larger than the sum of its proper divisors (3497821271).

206371451449 is an equidigital number, since it uses as much as digits as its factorization.

206371451449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3497821270.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 206371451449 in words is "two hundred six billion, three hundred seventy-one million, four hundred fifty-one thousand, four hundred forty-nine".