206471235977449 has 3 divisors (see below), whose sum is σ = 206471250346557. Its totient is φ = 206471221608342.

The previous prime is 206471235977339. The next prime is 206471235977473. The reversal of 206471235977449 is 944779532174602.

The square root of 206471235977449 is 14369107.

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

206471235977449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 206471235977449 - 2⁹ = 206471235976937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206471235977549) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7184554 + ... + 21553660.

It is an arithmetic number, because the mean of its divisors is an integer number (68823750115519).

Almost surely, 2^{206471235977449} is an apocalyptic number.

206471235977449 is the 14369107-th square number.

206471235977449 is the 7184554-th centered octagonal number.

It is an amenable number.

206471235977449 is a deficient number, since it is larger than the sum of its proper divisors (14369108).

206471235977449 is an frugal number, since it uses more digits than its factorization.

206471235977449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28738214 (or 14369107 counting only the distinct ones).

The product of its (nonzero) digits is 640120320, while the sum is 70.

The spelling of 206471235977449 in words is "two hundred six trillion, four hundred seventy-one billion, two hundred thirty-five million, nine hundred seventy-seven thousand, four hundred forty-nine".