9919523306345 has 32 divisors (see below), whose sum is σ = 12891133221120. Its totient is φ = 7304973984000.

The previous prime is 9919523306333. The next prime is 9919523306449. The reversal of 9919523306345 is 5436033259199.

It is not a de Polignac number, because 9919523306345 - 2²⁰ = 9919522257769 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3820406 + ... + 5868095.

It is an arithmetic number, because the mean of its divisors is an integer number (402847913160).

Almost surely, 2^{9919523306345} is an apocalyptic number.

It is an amenable number.

9919523306345 is a deficient number, since it is larger than the sum of its proper divisors (2971609914775).

9919523306345 is a wasteful number, since it uses less digits than its factorization.

9919523306345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9688865.

The product of its (nonzero) digits is 23619600, while the sum is 59.

The spelling of 9919523306345 in words is "nine trillion, nine hundred nineteen billion, five hundred twenty-three million, three hundred six thousand, three hundred forty-five".