240954761981 has 2 divisors, whose sum is σ = 240954761982. Its totient is φ = 240954761980.

The previous prime is 240954761953. The next prime is 240954762143. The reversal of 240954761981 is 189167459042.

240954761981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217002247225 + 23952514756 = 465835^2 + 154766^2 .

It is a cyclic number.

It is not a de Polignac number, because 240954761981 - 2¹⁴ = 240954745597 is a prime.

It is a super-2 number, since 2×240954761981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240954761951) by changing a digit.

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 as a sum of consecutive naturals, namely, 120477380990 + 120477380991.

It is an arithmetic number, because the mean of its divisors is an integer number (120477380991).

Almost surely, 2^240954761981 is an apocalyptic number.

It is an amenable number.

240954761981 is a deficient number, since it is larger than the sum of its proper divisors (1).

240954761981 is an equidigital number, since it uses as much as digits as its factorization.

240954761981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 56.

The spelling of 240954761981 in words is "two hundred forty billion, nine hundred fifty-four million, seven hundred sixty-one thousand, nine hundred eighty-one".