240908198981 has 2 divisors, whose sum is σ = 240908198982. Its totient is φ = 240908198980.

The previous prime is 240908198969. The next prime is 240908199013. The reversal of 240908198981 is 189891809042.

240908198981 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., 196625730625 + 44282468356 = 443425^2 + 210434^2 .

It is a cyclic number.

It is not a de Polignac number, because 240908198981 - 2³⁰ = 239834457157 is a prime.

It is a super-2 number, since 2×240908198981² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 240908198981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240908198081) 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, 120454099490 + 120454099491.

It is an arithmetic number, because the mean of its divisors is an integer number (120454099491).

Almost surely, 2^240908198981 is an apocalyptic number.

It is an amenable number.

240908198981 is a deficient number, since it is larger than the sum of its proper divisors (1).

240908198981 is an equidigital number, since it uses as much as digits as its factorization.

240908198981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2985984, while the sum is 59.

The spelling of 240908198981 in words is "two hundred forty billion, nine hundred eight million, one hundred ninety-eight thousand, nine hundred eighty-one".