9900323181523 has 2 divisors, whose sum is σ = 9900323181524. Its totient is φ = 9900323181522.

The previous prime is 9900323181481. The next prime is 9900323181577. The reversal of 9900323181523 is 3251813230099.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9900323181523 - 2²¹ = 9900321084371 is a prime.

It is not a weakly prime, because it can be changed into another prime (9900323181823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4950161590761 + 4950161590762.

It is an arithmetic number, because the mean of its divisors is an integer number (4950161590762).

Almost surely, 2^{9900323181523} is an apocalyptic number.

9900323181523 is a deficient number, since it is larger than the sum of its proper divisors (1).

9900323181523 is an equidigital number, since it uses as much as digits as its factorization.

9900323181523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 9900323181523 in words is "nine trillion, nine hundred billion, three hundred twenty-three million, one hundred eighty-one thousand, five hundred twenty-three".