921903116481 has 12 divisors (see below), whose sum is σ = 1339611716352. Its totient is φ = 610921824696.

The previous prime is 921903116471. The next prime is 921903116503. The reversal of 921903116481 is 184611309129.

921903116481 is a `hidden beast` number, since 92 + 190 + 311 + 64 + 8 + 1 = 666.

It is not a de Polignac number, because 921903116481 - 2⁷ = 921903116353 is a prime.

It is a super-2 number, since 2×921903116481² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (921903116441) 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 11 ways as a sum of consecutive naturals, for example, 306686161 + ... + 306689166.

It is an arithmetic number, because the mean of its divisors is an integer number (111634309696).

Almost surely, 2^921903116481 is an apocalyptic number.

It is an amenable number.

921903116481 is a deficient number, since it is larger than the sum of its proper divisors (417708599871).

921903116481 is a wasteful number, since it uses less digits than its factorization.

921903116481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613375500 (or 613375497 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 921903116481 in words is "nine hundred twenty-one billion, nine hundred three million, one hundred sixteen thousand, four hundred eighty-one".