9999872745773 has 2 divisors, whose sum is σ = 9999872745774. Its totient is φ = 9999872745772.

The previous prime is 9999872745761. The next prime is 9999872745829. The reversal of 9999872745773 is 3775472789999.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8402131241449 + 1597741504324 = 2898643^2 + 1264018^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999872745773 - 2²⁸ = 9999604310317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999872745743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999936372886 + 4999936372887.

It is an arithmetic number, because the mean of its divisors is an integer number (4999936372887).

Almost surely, 2^{9999872745773} is an apocalyptic number.

It is an amenable number.

9999872745773 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999872745773 is an equidigital number, since it uses as much as digits as its factorization.

9999872745773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15122842560, while the sum is 86.

The spelling of 9999872745773 in words is "nine trillion, nine hundred ninety-nine billion, eight hundred seventy-two million, seven hundred forty-five thousand, seven hundred seventy-three".