240321317762861 has 2 divisors, whose sum is σ = 240321317762862. Its totient is φ = 240321317762860.

The previous prime is 240321317762767. The next prime is 240321317762879. The reversal of 240321317762861 is 168267713123042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131536814102500 + 108784503660361 = 11468950^2 + 10429981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240321317762861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240321317762261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120160658881430 + 120160658881431.

It is an arithmetic number, because the mean of its divisors is an integer number (120160658881431).

Almost surely, 2^{240321317762861} is an apocalyptic number.

It is an amenable number.

240321317762861 is a deficient number, since it is larger than the sum of its proper divisors (1).

240321317762861 is an equidigital number, since it uses as much as digits as its factorization.

240321317762861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4064256, while the sum is 53.

The spelling of 240321317762861 in words is "two hundred forty trillion, three hundred twenty-one billion, three hundred seventeen million, seven hundred sixty-two thousand, eight hundred sixty-one".