205540434002 has 8 divisors (see below), whose sum is σ = 311363232012. Its totient is φ = 101752690000.

The previous prime is 205540433951. The next prime is 205540434019. The reversal of 205540434002 is 200434045502.

It can be written as a sum of positive squares in 2 ways, for example, as 130978124281 + 74562309721 = 361909^2 + 273061^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508763249 + ... + 508763652.

Almost surely, 2^205540434002 is an apocalyptic number.

205540434002 is a deficient number, since it is larger than the sum of its proper divisors (105822798010).

205540434002 is a wasteful number, since it uses less digits than its factorization.

205540434002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017527004.

The product of its (nonzero) digits is 19200, while the sum is 29.

Adding to 205540434002 its reverse (200434045502), we get a palindrome (405974479504).

The spelling of 205540434002 in words is "two hundred five billion, five hundred forty million, four hundred thirty-four thousand, two".