204545454545461 has 2 divisors, whose sum is σ = 204545454545462. Its totient is φ = 204545454545460.

The previous prime is 204545454545423. The next prime is 204545454545473. The reversal of 204545454545461 is 164545454545402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124943905864561 + 79601548680900 = 11177831^2 + 8921970^2 .

It is a cyclic number.

It is not a de Polignac number, because 204545454545461 - 2¹³ = 204545454537269 is a prime.

It is a super-2 number, since 2×204545454545461² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204545454545396 and 204545454545405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204545454540461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102272727272730 + 102272727272731.

It is an arithmetic number, because the mean of its divisors is an integer number (102272727272731).

Almost surely, 2^{204545454545461} is an apocalyptic number.

It is an amenable number.

204545454545461 is a deficient number, since it is larger than the sum of its proper divisors (1).

204545454545461 is an equidigital number, since it uses as much as digits as its factorization.

204545454545461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 153600000, while the sum is 58.

The spelling of 204545454545461 in words is "two hundred four trillion, five hundred forty-five billion, four hundred fifty-four million, five hundred forty-five thousand, four hundred sixty-one".