1311445426644 has 36 divisors (see below), whose sum is σ = 3315715341120. Its totient is φ = 437059763280.

The previous prime is 1311445426631. The next prime is 1311445426663. The reversal of 1311445426644 is 4466245441131.

It is a happy number.

1311445426644 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 4 + 4 + 542 + 66 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1311445426644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3516364 + ... + 3871395.

It is an arithmetic number, because the mean of its divisors is an integer number (92103203920).

Almost surely, 2^{1311445426644} is an apocalyptic number.

It is an amenable number.

1311445426644 is an abundant number, since it is smaller than the sum of its proper divisors (2004269914476).

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

1311445426644 is a wasteful number, since it uses less digits than its factorization.

1311445426644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7392700 (or 7392695 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 45.

The spelling of 1311445426644 in words is "one trillion, three hundred eleven billion, four hundred forty-five million, four hundred twenty-six thousand, six hundred forty-four".