204521662211345 has 16 divisors (see below), whose sum is σ = 246698918369280. Its totient is φ = 162768722801664.

The previous prime is 204521662211239. The next prime is 204521662211459. The reversal of 204521662211345 is 543112266125402.

It is a cyclic number.

It is not a de Polignac number, because 204521662211345 - 2¹⁰ = 204521662210321 is a prime.

It is a super-2 number, since 2×204521662211345² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204521662211296 and 204521662211305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237874736 + ... + 238732974.

It is an arithmetic number, because the mean of its divisors is an integer number (15418682398080).

Almost surely, 2^{204521662211345} is an apocalyptic number.

It is an amenable number.

204521662211345 is a deficient number, since it is larger than the sum of its proper divisors (42177256157935).

204521662211345 is a wasteful number, since it uses less digits than its factorization.

204521662211345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105384.

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 204521662211345 in words is "two hundred four trillion, five hundred twenty-one billion, six hundred sixty-two million, two hundred eleven thousand, three hundred forty-five".