205205536042 has 16 divisors (see below), whose sum is σ = 331509414600. Its totient is φ = 94703519232.

The previous prime is 205205536037. The next prime is 205205536057. The reversal of 205205536042 is 240635502502.

It can be written as a sum of positive squares in 4 ways, for example, as 134726436601 + 70479099441 = 367051^2 + 265479^2 .

It is a super-2 number, since 2×205205536042² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205205535989 and 205205536007.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102558 + ... + 648790.

Almost surely, 2^205205536042 is an apocalyptic number.

205205536042 is a deficient number, since it is larger than the sum of its proper divisors (126303878558).

205205536042 is a wasteful number, since it uses less digits than its factorization.

205205536042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560697.

The product of its (nonzero) digits is 72000, while the sum is 34.

The spelling of 205205536042 in words is "two hundred five billion, two hundred five million, five hundred thirty-six thousand, forty-two".