205135404154145 has 16 divisors (see below), whose sum is σ = 260861842800720. Its totient is φ = 154584795724800.

The previous prime is 205135404154133. The next prime is 205135404154159. The reversal of 205135404154145 is 541451404531502.

It can be written as a sum of positive squares in 8 ways, for example, as 47031738804961 + 158103665349184 = 6857969^2 + 12573928^2 .

It is not a de Polignac number, because 205135404154145 - 2⁴⁴ = 187543218109729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205135404154096 and 205135404154105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17252761436 + ... + 17252773325.

It is an arithmetic number, because the mean of its divisors is an integer number (16303865175045).

Almost surely, 2^{205135404154145} is an apocalyptic number.

It is an amenable number.

205135404154145 is a deficient number, since it is larger than the sum of its proper divisors (55726438646575).

205135404154145 is a wasteful number, since it uses less digits than its factorization.

205135404154145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34505534836.

The product of its (nonzero) digits is 960000, while the sum is 44.

Adding to 205135404154145 its reverse (541451404531502), we get a palindrome (746586808685647).

The spelling of 205135404154145 in words is "two hundred five trillion, one hundred thirty-five billion, four hundred four million, one hundred fifty-four thousand, one hundred forty-five".