11545839312321 has 4 divisors (see below), whose sum is σ = 15394452416432. Its totient is φ = 7697226208212.

The previous prime is 11545839312277. The next prime is 11545839312331. The reversal of 11545839312321 is 12321393854511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11545839312321 - 2¹⁰ = 11545839311297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11545839312331) 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 3 ways as a sum of consecutive naturals, for example, 1924306552051 + ... + 1924306552056.

It is an arithmetic number, because the mean of its divisors is an integer number (3848613104108).

Almost surely, 2^{11545839312321} is an apocalyptic number.

It is an amenable number.

11545839312321 is a deficient number, since it is larger than the sum of its proper divisors (3848613104111).

11545839312321 is an equidigital number, since it uses as much as digits as its factorization.

11545839312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3848613104110.

The product of its digits is 777600, while the sum is 48.

The spelling of 11545839312321 in words is "eleven trillion, five hundred forty-five billion, eight hundred thirty-nine million, three hundred twelve thousand, three hundred twenty-one".