1311540545445 has 32 divisors (see below), whose sum is σ = 2273749629312. Its totient is φ = 641720247552.

The previous prime is 1311540545417. The next prime is 1311540545449. The reversal of 1311540545445 is 5445450451131.

It is a happy number.

It is not a de Polignac number, because 1311540545445 - 2⁹ = 1311540544933 is a prime.

It is a super-2 number, since 2×1311540545445² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1311540545397 and 1311540545406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311540545449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20599654 + ... + 20663223.

It is an arithmetic number, because the mean of its divisors is an integer number (71054675916).

Almost surely, 2^{1311540545445} is an apocalyptic number.

1311540545445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311540545445 is a deficient number, since it is larger than the sum of its proper divisors (962209083867).

1311540545445 is a wasteful number, since it uses less digits than its factorization.

1311540545445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41263061.

The product of its (nonzero) digits is 480000, while the sum is 42.

Adding to 1311540545445 its reverse (5445450451131), we get a palindrome (6756990996576).

The spelling of 1311540545445 in words is "one trillion, three hundred eleven billion, five hundred forty million, five hundred forty-five thousand, four hundred forty-five".