205057487705 has 8 divisors (see below), whose sum is σ = 281221697472. Its totient is φ = 140610848688.

The previous prime is 205057487647. The next prime is 205057487717. The reversal of 205057487705 is 507784750502.

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 205057487705 - 2¹⁸ = 205057225561 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 2929392647 + ... + 2929392716.

It is an arithmetic number, because the mean of its divisors is an integer number (35152712184).

Almost surely, 2^205057487705 is an apocalyptic number.

It is an amenable number.

205057487705 is a deficient number, since it is larger than the sum of its proper divisors (76164209767).

205057487705 is an equidigital number, since it uses as much as digits as its factorization.

205057487705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5858785375.

The product of its (nonzero) digits is 2744000, while the sum is 50.

The spelling of 205057487705 in words is "two hundred five billion, fifty-seven million, four hundred eighty-seven thousand, seven hundred five".