9742776511220 has 96 divisors (see below), whose sum is σ = 22129586519040. Its totient is φ = 3588966809600.

The previous prime is 9742776511189. The next prime is 9742776511241. The reversal of 9742776511220 is 221156772479.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68467145 + ... + 68609295.

It is an arithmetic number, because the mean of its divisors is an integer number (230516526240).

Almost surely, 2^{9742776511220} 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 9742776511220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11064793259520).

9742776511220 is an abundant number, since it is smaller than the sum of its proper divisors (12386810007820).

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

9742776511220 is a wasteful number, since it uses less digits than its factorization.

9742776511220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146513 (or 146511 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 53.

The spelling of 9742776511220 in words is "nine trillion, seven hundred forty-two billion, seven hundred seventy-six million, five hundred eleven thousand, two hundred twenty".