7218040123523 has 2 divisors, whose sum is σ = 7218040123524. Its totient is φ = 7218040123522.

The previous prime is 7218040123507. The next prime is 7218040123561. The reversal of 7218040123523 is 3253210408127.

It is an a-pointer prime, because the next prime (7218040123561) can be obtained adding 7218040123523 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7218040123523 - 2⁴ = 7218040123507 is a prime.

It is not a weakly prime, because it can be changed into another prime (7218040120523) 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, 3609020061761 + 3609020061762.

It is an arithmetic number, because the mean of its divisors is an integer number (3609020061762).

Almost surely, 2^{7218040123523} is an apocalyptic number.

7218040123523 is a deficient number, since it is larger than the sum of its proper divisors (1).

7218040123523 is an equidigital number, since it uses as much as digits as its factorization.

7218040123523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 7218040123523 in words is "seven trillion, two hundred eighteen billion, forty million, one hundred twenty-three thousand, five hundred twenty-three".