205748142477649 has 8 divisors (see below), whose sum is σ = 205773442973280. Its totient is φ = 205722842990016.

The previous prime is 205748142477641. The next prime is 205748142477727. The reversal of 205748142477649 is 946774241847502.

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 205748142477649 - 2³ = 205748142477641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205748142477641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458393074 + ... + 458841700.

It is an arithmetic number, because the mean of its divisors is an integer number (25721680371660).

Almost surely, 2^{205748142477649} is an apocalyptic number.

It is an amenable number.

205748142477649 is a deficient number, since it is larger than the sum of its proper divisors (25300495631).

205748142477649 is a wasteful number, since it uses less digits than its factorization.

205748142477649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503999.

The product of its (nonzero) digits is 758661120, while the sum is 70.

The spelling of 205748142477649 in words is "two hundred five trillion, seven hundred forty-eight billion, one hundred forty-two million, four hundred seventy-seven thousand, six hundred forty-nine".