1311440044551 has 32 divisors (see below), whose sum is σ = 2173001026560. Its totient is φ = 685032574464.

The previous prime is 1311440044531. The next prime is 1311440044601. The reversal of 1311440044551 is 1554400441131.

It is not a de Polignac number, because 1311440044551 - 2⁹ = 1311440044039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311440044531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23291346 + ... + 23347583.

It is an arithmetic number, because the mean of its divisors is an integer number (67906282080).

Almost surely, 2^{1311440044551} is an apocalyptic number.

1311440044551 is a deficient number, since it is larger than the sum of its proper divisors (861560982009).

1311440044551 is a wasteful number, since it uses less digits than its factorization.

1311440044551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46639055.

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 1311440044551 its reverse (1554400441131), we get a palindrome (2865840485682).

The spelling of 1311440044551 in words is "one trillion, three hundred eleven billion, four hundred forty million, forty-four thousand, five hundred fifty-one".