1123308401280 has 512 divisors, whose sum is σ = 4028544737280. Its totient is φ = 264348057600.

The previous prime is 1123308401269. The next prime is 1123308401321. The reversal of 1123308401280 is 821048033211.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 64213335 + ... + 64230825.

It is an arithmetic number, because the mean of its divisors is an integer number (7868251440).

Almost surely, 2^{1123308401280} is an apocalyptic number.

1123308401280 is a gapful number since it is divisible by the number (10) 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 1123308401280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2014272368640).

1123308401280 is an abundant number, since it is smaller than the sum of its proper divisors (2905236336000).

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

1123308401280 is a wasteful number, since it uses less digits than its factorization.

1123308401280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17640 (or 17628 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 1123308401280 in words is "one trillion, one hundred twenty-three billion, three hundred eight million, four hundred one thousand, two hundred eighty".