9159920279640 has 192 divisors, whose sum is σ = 32072369696640. Its totient is φ = 2253860029440.

The previous prime is 9159920279599. The next prime is 9159920279641. The reversal of 9159920279640 is 469720299519.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9159920279641) 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 47 ways as a sum of consecutive naturals, for example, 11516410 + ... + 12286070.

It is an arithmetic number, because the mean of its divisors is an integer number (167043592170).

Almost surely, 2^{9159920279640} is an apocalyptic number.

9159920279640 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 9159920279640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16036184848320).

9159920279640 is an abundant number, since it is smaller than the sum of its proper divisors (22912449417000).

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

9159920279640 is a wasteful number, since it uses less digits than its factorization.

9159920279640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772234 (or 772227 counting only the distinct ones).

The product of its (nonzero) digits is 22044960, while the sum is 63.

The spelling of 9159920279640 in words is "nine trillion, one hundred fifty-nine billion, nine hundred twenty million, two hundred seventy-nine thousand, six hundred forty".