1311011040440 has 32 divisors (see below), whose sum is σ = 2950121137680. Its totient is φ = 524342852352.

The previous prime is 1311011040439. The next prime is 1311011040497. The reversal of 1311011040440 is 440401101131.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 1578122 + ... + 2261081.

Almost surely, 2^{1311011040440} is an apocalyptic number.

1311011040440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311011040440 is an abundant number, since it is smaller than the sum of its proper divisors (1639110097240).

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

1311011040440 is a wasteful number, since it uses less digits than its factorization.

1311011040440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3847751 (or 3847747 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1311011040440 its reverse (440401101131), we get a palindrome (1751412141571).

The spelling of 1311011040440 in words is "one trillion, three hundred eleven billion, eleven million, forty thousand, four hundred forty".