243045520961 has 2 divisors, whose sum is σ = 243045520962. Its totient is φ = 243045520960.

The previous prime is 243045520943. The next prime is 243045520979. The reversal of 243045520961 is 169025540342.

It is a balanced prime because it is at equal distance from previous prime (243045520943) and next prime (243045520979).

It can be written as a sum of positive squares in only one way, i.e., 207349086736 + 35696434225 = 455356^2 + 188935^2 .

It is a cyclic number.

It is not a de Polignac number, because 243045520961 - 2⁶ = 243045520897 is a prime.

It is a super-2 number, since 2×243045520961² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243045520901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121522760480 + 121522760481.

It is an arithmetic number, because the mean of its divisors is an integer number (121522760481).

Almost surely, 2^243045520961 is an apocalyptic number.

It is an amenable number.

243045520961 is a deficient number, since it is larger than the sum of its proper divisors (1).

243045520961 is an equidigital number, since it uses as much as digits as its factorization.

243045520961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 243045520961 in words is "two hundred forty-three billion, forty-five million, five hundred twenty thousand, nine hundred sixty-one".