1281317740288 has 72 divisors (see below), whose sum is σ = 2591202207888. Its totient is φ = 632265940992.

The previous prime is 1281317740267. The next prime is 1281317740301. The reversal of 1281317740288 is 8820477131821.

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 7 ways as a sum of consecutive naturals, for example, 20217706 + ... + 20280982.

It is an arithmetic number, because the mean of its divisors is an integer number (35988919554).

Almost surely, 2^{1281317740288} 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 1281317740288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1295601103944).

1281317740288 is an abundant number, since it is smaller than the sum of its proper divisors (1309884467600).

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

1281317740288 is an frugal number, since it uses more digits than its factorization.

1281317740288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64329 (or 64315 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 52.

The spelling of 1281317740288 in words is "one trillion, two hundred eighty-one billion, three hundred seventeen million, seven hundred forty thousand, two hundred eighty-eight".