206015552126645 has 16 divisors (see below), whose sum is σ = 247599226519920. Its totient is φ = 164558736420864.

The previous prime is 206015552126599. The next prime is 206015552126701. The reversal of 206015552126645 is 546621255510602.

It can be written as a sum of positive squares in 8 ways, for example, as 2723790452881 + 203291761673764 = 1650391^2 + 14258042^2 .

It is a cyclic number.

It is not a de Polignac number, because 206015552126645 - 2³² = 206011257159349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206015552126593 and 206015552126602.

It is a congruent number.

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, 772395047 + ... + 772661723.

It is an arithmetic number, because the mean of its divisors is an integer number (15474951657495).

Almost surely, 2^{206015552126645} is an apocalyptic number.

It is an amenable number.

206015552126645 is a deficient number, since it is larger than the sum of its proper divisors (41583674393275).

206015552126645 is a wasteful number, since it uses less digits than its factorization.

206015552126645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503944.

The product of its (nonzero) digits is 4320000, while the sum is 50.

The spelling of 206015552126645 in words is "two hundred six trillion, fifteen billion, five hundred fifty-two million, one hundred twenty-six thousand, six hundred forty-five".