205405154353 has 32 divisors (see below), whose sum is σ = 246615183360. Its totient is φ = 167357171520.

The previous prime is 205405154347. The next prime is 205405154359. The reversal of 205405154353 is 353451504502.

It is an interprime number because it is at equal distance from previous prime (205405154347) and next prime (205405154359).

It is not a de Polignac number, because 205405154353 - 2⁵ = 205405154321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205405154359) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10468450 + ... + 10488052.

It is an arithmetic number, because the mean of its divisors is an integer number (7706724480).

Almost surely, 2^205405154353 is an apocalyptic number.

It is an amenable number.

205405154353 is a deficient number, since it is larger than the sum of its proper divisors (41210029007).

205405154353 is a wasteful number, since it uses less digits than its factorization.

205405154353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20437.

The product of its (nonzero) digits is 180000, while the sum is 37.

Adding to 205405154353 its reverse (353451504502), we get a palindrome (558856658855).

The spelling of 205405154353 in words is "two hundred five billion, four hundred five million, one hundred fifty-four thousand, three hundred fifty-three".