205793342557 has 8 divisors (see below), whose sum is σ = 225665052480. Its totient is φ = 186115503360.

The previous prime is 205793342537. The next prime is 205793342617. The reversal of 205793342557 is 755243397502.

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 205793342557 - 2²³ = 205784953949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205793342527) 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, 48465457 + ... + 48469702.

It is an arithmetic number, because the mean of its divisors is an integer number (28208131560).

Almost surely, 2^205793342557 is an apocalyptic number.

It is an amenable number.

205793342557 is a deficient number, since it is larger than the sum of its proper divisors (19871709923).

205793342557 is a wasteful number, since it uses less digits than its factorization.

205793342557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96935363.

The product of its (nonzero) digits is 7938000, while the sum is 52.

Subtracting 205793342557 from its reverse (755243397502), we obtain a palindrome (549450054945).

The spelling of 205793342557 in words is "two hundred five billion, seven hundred ninety-three million, three hundred forty-two thousand, five hundred fifty-seven".