206145122449 has 8 divisors (see below), whose sum is σ = 235597174848. Its totient is φ = 176693757360.

The previous prime is 206145122431. The next prime is 206145122461. The reversal of 206145122449 is 944221541602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206145122449 - 2¹⁵ = 206145089681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206145123449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1052259 + ... + 1232695.

It is an arithmetic number, because the mean of its divisors is an integer number (29449646856).

Almost surely, 2^206145122449 is an apocalyptic number.

It is an amenable number.

206145122449 is a deficient number, since it is larger than the sum of its proper divisors (29452052399).

206145122449 is a wasteful number, since it uses less digits than its factorization.

206145122449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343655.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 206145122449 in words is "two hundred six billion, one hundred forty-five million, one hundred twenty-two thousand, four hundred forty-nine".