9817145982 has 72 divisors (see below), whose sum is σ = 25819060176. Its totient is φ = 2682941184.

The previous prime is 9817145971. The next prime is 9817145983. The reversal of 9817145982 is 2895417189.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9817145983) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 221683 + ... + 262254.

It is an arithmetic number, because the mean of its divisors is an integer number (358598058).

Almost surely, 2^9817145982 is an apocalyptic number.

9817145982 is an abundant number, since it is smaller than the sum of its proper divisors (16001914194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9817145982 is a wasteful number, since it uses less digits than its factorization.

9817145982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483982 (or 483972 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The square root of 9817145982 is about 99081.5118071984. The cubic root of 9817145982 is about 2141.2222602561. Note that the first 4 decimals are identical.

The spelling of 9817145982 in words is "nine billion, eight hundred seventeen million, one hundred forty-five thousand, nine hundred eighty-two".