1311055271280 has 80 divisors (see below), whose sum is σ = 4515857052960. Its totient is φ = 349614738432.

The previous prime is 1311055271249. The next prime is 1311055271291. The reversal of 1311055271280 is 821725501131.

1311055271280 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 0 + 5 + 527 + 128 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 303482857 + ... + 303487176.

It is an arithmetic number, because the mean of its divisors is an integer number (56448213162).

Almost surely, 2^{1311055271280} is an apocalyptic number.

1311055271280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311055271280 is an abundant number, since it is smaller than the sum of its proper divisors (3204801781680).

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

1311055271280 is a wasteful number, since it uses less digits than its factorization.

1311055271280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606970055 (or 606970043 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 36.

The spelling of 1311055271280 in words is "one trillion, three hundred eleven billion, fifty-five million, two hundred seventy-one thousand, two hundred eighty".