9291122243840 has 144 divisors (see below), whose sum is σ = 22692935619648. Its totient is φ = 3643451056128.

The previous prime is 9291122243831. The next prime is 9291122243857. The reversal of 9291122243840 is 483422211929.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86985347 + ... + 87092093.

It is an arithmetic number, because the mean of its divisors is an integer number (157589830692).

Almost surely, 2^{9291122243840} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9291122243840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11346467809824).

9291122243840 is an abundant number, since it is smaller than the sum of its proper divisors (13401813375808).

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

9291122243840 is a wasteful number, since it uses less digits than its factorization.

9291122243840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108104 (or 108090 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 9291122243840 in words is "nine trillion, two hundred ninety-one billion, one hundred twenty-two million, two hundred forty-three thousand, eight hundred forty".