71720240363 has 2 divisors, whose sum is σ = 71720240364. Its totient is φ = 71720240362.

The previous prime is 71720240357. The next prime is 71720240419. The reversal of 71720240363 is 36304202717.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71720240363 - 2¹⁸ = 71719978219 is a prime.

It is not a weakly prime, because it can be changed into another prime (71720243363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35860120181 + 35860120182.

It is an arithmetic number, because the mean of its divisors is an integer number (35860120182).

Almost surely, 2^71720240363 is an apocalyptic number.

71720240363 is a deficient number, since it is larger than the sum of its proper divisors (1).

71720240363 is an equidigital number, since it uses as much as digits as its factorization.

71720240363 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 35.

The spelling of 71720240363 in words is "seventy-one billion, seven hundred twenty million, two hundred forty thousand, three hundred sixty-three".