205364349857 has 16 divisors (see below), whose sum is σ = 213476465664. Its totient is φ = 197346240000.

The previous prime is 205364349737. The next prime is 205364349989. The reversal of 205364349857 is 758943463502.

It is a cyclic number.

It is not a de Polignac number, because 205364349857 - 2³² = 201069382561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205364369857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14602373 + ... + 14616429.

It is an arithmetic number, because the mean of its divisors is an integer number (13342279104).

Almost surely, 2^205364349857 is an apocalyptic number.

It is an amenable number.

205364349857 is a deficient number, since it is larger than the sum of its proper divisors (8112115807).

205364349857 is a wasteful number, since it uses less digits than its factorization.

205364349857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17360.

The product of its (nonzero) digits is 21772800, while the sum is 56.

The spelling of 205364349857 in words is "two hundred five billion, three hundred sixty-four million, three hundred forty-nine thousand, eight hundred fifty-seven".