205238703158561 has 8 divisors (see below), whose sum is σ = 205255743648384. Its totient is φ = 205221663419760.

The previous prime is 205238703158551. The next prime is 205238703158597. The reversal of 205238703158561 is 165851307832502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205238703158561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205238703158497 and 205238703158506.

It is not an unprimeable number, because it can be changed into a prime (205238703158501) 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, 631288730 + ... + 631613756.

It is an arithmetic number, because the mean of its divisors is an integer number (25656967956048).

Almost surely, 2^{205238703158561} is an apocalyptic number.

It is an amenable number.

205238703158561 is a deficient number, since it is larger than the sum of its proper divisors (17040489823).

205238703158561 is a wasteful number, since it uses less digits than its factorization.

205238703158561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375511.

The product of its (nonzero) digits is 12096000, while the sum is 56.

The spelling of 205238703158561 in words is "two hundred five trillion, two hundred thirty-eight billion, seven hundred three million, one hundred fifty-eight thousand, five hundred sixty-one".