9999872745777 has 32 divisors (see below), whose sum is σ = 15594772368000. Its totient is φ = 6315535396800.

The previous prime is 9999872745773. The next prime is 9999872745829. The reversal of 9999872745777 is 7775472789999.

9999872745777 is a `hidden beast` number, since 9 + 9 + 9 + 9 + 8 + 7 + 27 + 4 + 577 + 7 = 666.

It is not a de Polignac number, because 9999872745777 - 2² = 9999872745773 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9999872745773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19876027 + ... + 20372927.

It is an arithmetic number, because the mean of its divisors is an integer number (487336636500).

Almost surely, 2^{9999872745777} is an apocalyptic number.

It is an amenable number.

9999872745777 is a deficient number, since it is larger than the sum of its proper divisors (5594899622223).

9999872745777 is a wasteful number, since it uses less digits than its factorization.

9999872745777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536158 (or 536152 counting only the distinct ones).

The product of its digits is 35286632640, while the sum is 90.

The spelling of 9999872745777 in words is "nine trillion, nine hundred ninety-nine billion, eight hundred seventy-two million, seven hundred forty-five thousand, seven hundred seventy-seven".