1311454243555 has 16 divisors (see below), whose sum is σ = 1580657639904. Its totient is φ = 1044558432000.

The previous prime is 1311454243531. The next prime is 1311454243579. The reversal of 1311454243555 is 5553424541131.

It is an interprime number because it is at equal distance from previous prime (1311454243531) and next prime (1311454243579).

It is not a de Polignac number, because 1311454243555 - 2⁵ = 1311454243523 is a prime.

It is a Duffinian 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, 2892337 + ... + 3314893.

It is an arithmetic number, because the mean of its divisors is an integer number (98791102494).

Almost surely, 2^{1311454243555} is an apocalyptic number.

1311454243555 is a deficient number, since it is larger than the sum of its proper divisors (269203396349).

1311454243555 is a wasteful number, since it uses less digits than its factorization.

1311454243555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425286.

The product of its digits is 720000, while the sum is 43.

Adding to 1311454243555 its reverse (5553424541131), we get a palindrome (6864878784686).

It can be divided in two parts, 1311454 and 243555, that added together give a square (1555009 = 1247²).

The spelling of 1311454243555 in words is "one trillion, three hundred eleven billion, four hundred fifty-four million, two hundred forty-three thousand, five hundred fifty-five".