1311274115540 has 48 divisors (see below), whose sum is σ = 2778346013184. Its totient is φ = 519826656000.

The previous prime is 1311274115507. The next prime is 1311274115561. The reversal of 1311274115540 is 455114721131.

It is a self number, because there is not a number n which added to its sum of digits gives 1311274115540.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 797912 + ... + 1805328.

It is an arithmetic number, because the mean of its divisors is an integer number (57882208608).

Almost surely, 2^{1311274115540} is an apocalyptic number.

1311274115540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311274115540 is an abundant number, since it is smaller than the sum of its proper divisors (1467071897644).

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

1311274115540 is a wasteful number, since it uses less digits than its factorization.

1311274115540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008008 (or 1008006 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 35.

Adding to 1311274115540 its reverse (455114721131), we get a palindrome (1766388836671).

The spelling of 1311274115540 in words is "one trillion, three hundred eleven billion, two hundred seventy-four million, one hundred fifteen thousand, five hundred forty".