1305531344345 has 8 divisors (see below), whose sum is σ = 1566683555976. Its totient is φ = 1044394446976.

The previous prime is 1305531344311. The next prime is 1305531344357. The reversal of 1305531344345 is 5434431355031.

It can be written as a sum of positive squares in 4 ways, for example, as 4088451481 + 1301442892864 = 63941^2 + 1140808^2 .

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 1305531344345 - 2¹⁰ = 1305531343321 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3640172 + ... + 3982701.

It is an arithmetic number, because the mean of its divisors is an integer number (195835444497).

Almost surely, 2^{1305531344345} is an apocalyptic number.

It is an amenable number.

1305531344345 is a deficient number, since it is larger than the sum of its proper divisors (261152211631).

1305531344345 is an equidigital number, since it uses as much as digits as its factorization.

1305531344345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7657131.

The product of its (nonzero) digits is 648000, while the sum is 41.

Adding to 1305531344345 its reverse (5434431355031), we get a palindrome (6739962699376).

The spelling of 1305531344345 in words is "one trillion, three hundred five billion, five hundred thirty-one million, three hundred forty-four thousand, three hundred forty-five".