9159809940 has 288 divisors, whose sum is σ = 31029264000. Its totient is φ = 2236999680.

The previous prime is 9159809881. The next prime is 9159809941. The reversal of 9159809940 is 499089519.

9159809940 is a `hidden beast` number, since 9 + 1 + 598 + 0 + 9 + 9 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9159809941) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9859396 + ... + 9860324.

It is an arithmetic number, because the mean of its divisors is an integer number (107740500).

Almost surely, 2^9159809940 is an apocalyptic number.

9159809940 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9159809940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15514632000).

9159809940 is an abundant number, since it is smaller than the sum of its proper divisors (21869454060).

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

9159809940 is a wasteful number, since it uses less digits than its factorization.

9159809940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028 (or 989 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The square root of 9159809940 is about 95706.8959897875. The cubic root of 9159809940 is about 2092.3234418932.

The spelling of 9159809940 in words is "nine billion, one hundred fifty-nine million, eight hundred nine thousand, nine hundred forty".