9881308925505 has 24 divisors (see below), whose sum is σ = 17137554393960. Its totient is φ = 5266969194240.

The previous prime is 9881308925503. The next prime is 9881308925533. The reversal of 9881308925505 is 5055298031889.

9881308925505 is a `hidden beast` number, since 9 + 8 + 8 + 1 + 30 + 8 + 92 + 5 + 505 = 666.

9881308925505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 146010344769 + 9735298580736 = 382113^2 + 3120144^2 .

It is not a de Polignac number, because 9881308925505 - 2¹ = 9881308925503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9881308925503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63718210 + ... + 63873099.

It is an arithmetic number, because the mean of its divisors is an integer number (714064766415).

Almost surely, 2^{9881308925505} is an apocalyptic number.

It is an amenable number.

9881308925505 is a deficient number, since it is larger than the sum of its proper divisors (7256245468455).

9881308925505 is a wasteful number, since it uses less digits than its factorization.

9881308925505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127593041 (or 127593038 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 63.

The spelling of 9881308925505 in words is "nine trillion, eight hundred eighty-one billion, three hundred eight million, nine hundred twenty-five thousand, five hundred five".