12531131464345 has 8 divisors (see below), whose sum is σ = 16194077584776. Its totient is φ = 9253758619776.

The previous prime is 12531131464289. The next prime is 12531131464381. The reversal of 12531131464345 is 54346413113521.

It can be written as a sum of positive squares in 4 ways, for example, as 242327783824 + 12288803680521 = 492268^2 + 3505539^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12531131464345 - 2²¹ = 12531129367193 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96393318892 + ... + 96393319021.

It is an arithmetic number, because the mean of its divisors is an integer number (2024259698097).

Almost surely, 2^{12531131464345} is an apocalyptic number.

It is an amenable number.

12531131464345 is a deficient number, since it is larger than the sum of its proper divisors (3662946120431).

12531131464345 is a wasteful number, since it uses less digits than its factorization.

12531131464345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192786637931.

The product of its digits is 518400, while the sum is 43.

Adding to 12531131464345 its reverse (54346413113521), we get a palindrome (66877544577866).

The spelling of 12531131464345 in words is "twelve trillion, five hundred thirty-one billion, one hundred thirty-one million, four hundred sixty-four thousand, three hundred forty-five".