1312302505545 has 48 divisors (see below), whose sum is σ = 2351015219280. Its totient is φ = 676641019392.

The previous prime is 1312302505531. The next prime is 1312302505567. The reversal of 1312302505545 is 5455052032131.

1312302505545 is a `hidden beast` number, since 1 + 31 + 2 + 30 + 2 + 50 + 5 + 545 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 173446427961 + 1138856077584 = 416469^2 + 1067172^2 .

It is not a de Polignac number, because 1312302505545 - 2⁴ = 1312302505529 is a prime.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 2248690 + ... + 2771499.

It is an arithmetic number, because the mean of its divisors is an integer number (48979483735).

Almost surely, 2^{1312302505545} is an apocalyptic number.

1312302505545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1312302505545 is a deficient number, since it is larger than the sum of its proper divisors (1038712713735).

1312302505545 is a wasteful number, since it uses less digits than its factorization.

1312302505545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5020394 (or 5020391 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

Adding to 1312302505545 its reverse (5455052032131), we get a palindrome (6767354537676).

The spelling of 1312302505545 in words is "one trillion, three hundred twelve billion, three hundred two million, five hundred five thousand, five hundred forty-five".