7266788978256 has 140 divisors (see below), whose sum is σ = 21112092736980. Its totient is φ = 2421959616000.

The previous prime is 7266788978233. The next prime is 7266788978287. The reversal of 7266788978256 is 6528798876627.

It can be written as a sum of positive squares in 2 ways, for example, as 3852128483856 + 3414660494400 = 1962684^2 + 1847880^2 .

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 105279756 + ... + 105348756.

It is an arithmetic number, because the mean of its divisors is an integer number (150800662407).

Almost surely, 2^{7266788978256} 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 7266788978256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10556046368490).

7266788978256 is an abundant number, since it is smaller than the sum of its proper divisors (13845303758724).

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

7266788978256 is an equidigital number, since it uses as much as digits as its factorization.

7266788978256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78056 (or 78035 counting only the distinct ones).

The product of its digits is 6827950080, while the sum is 81.

The spelling of 7266788978256 in words is "seven trillion, two hundred sixty-six billion, seven hundred eighty-eight million, nine hundred seventy-eight thousand, two hundred fifty-six".