1311266144560 has 20 divisors (see below), whose sum is σ = 3048693786288. Its totient is φ = 524506457792.

The previous prime is 1311266144449. The next prime is 1311266144581. The reversal of 1311266144560 is 654416621131.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8195413324 + ... + 8195413483.

Almost surely, 2^{1311266144560} is an apocalyptic number.

1311266144560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311266144560 is an abundant number, since it is smaller than the sum of its proper divisors (1737427641728).

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

1311266144560 is a wasteful number, since it uses less digits than its factorization.

1311266144560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16390826820 (or 16390826814 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 1311266144560 in words is "one trillion, three hundred eleven billion, two hundred sixty-six million, one hundred forty-four thousand, five hundred sixty".