9218578223479 has 2 divisors, whose sum is σ = 9218578223480. Its totient is φ = 9218578223478.

The previous prime is 9218578223467. The next prime is 9218578223513. The reversal of 9218578223479 is 9743228758129.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9218578223479 - 2³³ = 9209988288887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9218578223419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4609289111739 + 4609289111740.

It is an arithmetic number, because the mean of its divisors is an integer number (4609289111740).

Almost surely, 2^{9218578223479} is an apocalyptic number.

9218578223479 is a deficient number, since it is larger than the sum of its proper divisors (1).

9218578223479 is an equidigital number, since it uses as much as digits as its factorization.

9218578223479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 121927680, while the sum is 67.

The spelling of 9218578223479 in words is "nine trillion, two hundred eighteen billion, five hundred seventy-eight million, two hundred twenty-three thousand, four hundred seventy-nine".