9851669490 has 128 divisors (see below), whose sum is σ = 27830863872. Its totient is φ = 2208706560.

The previous prime is 9851669441. The next prime is 9851669533. The reversal of 9851669490 is 949661589.

9851669490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9851669490.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 181564 + ... + 229496.

It is an arithmetic number, because the mean of its divisors is an integer number (217428624).

Almost surely, 2^9851669490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9851669490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13915431936).

9851669490 is an abundant number, since it is smaller than the sum of its proper divisors (17979194382).

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

9851669490 is a wasteful number, since it uses less digits than its factorization.

9851669490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48004.

The product of its (nonzero) digits is 4199040, while the sum is 57.

The square root of 9851669490 is about 99255.5766191502. The cubic root of 9851669490 is about 2143.7293031913.

The spelling of 9851669490 in words is "nine billion, eight hundred fifty-one million, six hundred sixty-nine thousand, four hundred ninety".