818918939623 has 2 divisors, whose sum is σ = 818918939624. Its totient is φ = 818918939622.

The previous prime is 818918939569. The next prime is 818918939677. The reversal of 818918939623 is 326939819818.

It is a balanced prime because it is at equal distance from previous prime (818918939569) and next prime (818918939677).

It is a cyclic number.

It is not a de Polignac number, because 818918939623 - 2¹⁷ = 818918808551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (818918939323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409459469811 + 409459469812.

It is an arithmetic number, because the mean of its divisors is an integer number (409459469812).

Almost surely, 2^818918939623 is an apocalyptic number.

818918939623 is a deficient number, since it is larger than the sum of its proper divisors (1).

818918939623 is an equidigital number, since it uses as much as digits as its factorization.

818918939623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40310784, while the sum is 67.

The spelling of 818918939623 in words is "eight hundred eighteen billion, nine hundred eighteen million, nine hundred thirty-nine thousand, six hundred twenty-three".