240044354372261 has 2 divisors, whose sum is σ = 240044354372262. Its totient is φ = 240044354372260.

The previous prime is 240044354372257. The next prime is 240044354372293. The reversal of 240044354372261 is 162273453440042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237541611388225 + 2502742984036 = 15412385^2 + 1582006^2 .

It is a cyclic number.

It is not a de Polignac number, because 240044354372261 - 2² = 240044354372257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240044354372561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120022177186130 + 120022177186131.

It is an arithmetic number, because the mean of its divisors is an integer number (120022177186131).

Almost surely, 2^{240044354372261} is an apocalyptic number.

It is an amenable number.

240044354372261 is a deficient number, since it is larger than the sum of its proper divisors (1).

240044354372261 is an equidigital number, since it uses as much as digits as its factorization.

240044354372261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3870720, while the sum is 47.

The spelling of 240044354372261 in words is "two hundred forty trillion, forty-four billion, three hundred fifty-four million, three hundred seventy-two thousand, two hundred sixty-one".