1323512140545 has 24 divisors (see below), whose sum is σ = 2621814526656. Its totient is φ = 605034121248.

The previous prime is 1323512140493. The next prime is 1323512140549. The reversal of 1323512140545 is 5450412153231.

1323512140545 is a `hidden beast` number, since 1 + 3 + 2 + 3 + 51 + 21 + 40 + 545 = 666.

It is not a de Polignac number, because 1323512140545 - 2⁷ = 1323512140417 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1323512140549) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2100812607 + ... + 2100813236.

It is an arithmetic number, because the mean of its divisors is an integer number (109242271944).

Almost surely, 2^{1323512140545} is an apocalyptic number.

1323512140545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1323512140545 is a deficient number, since it is larger than the sum of its proper divisors (1298302386111).

1323512140545 is a wasteful number, since it uses less digits than its factorization.

1323512140545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4201625861 (or 4201625858 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 1323512140545 its reverse (5450412153231), we get a palindrome (6773924293776).

The spelling of 1323512140545 in words is "one trillion, three hundred twenty-three billion, five hundred twelve million, one hundred forty thousand, five hundred forty-five".