1305643223344 has 10 divisors (see below), whose sum is σ = 2529683745260. Its totient is φ = 652821611664.

The previous prime is 1305643223279. The next prime is 1305643223351. The reversal of 1305643223344 is 4433223465031.

It is a super-2 number, since 2×1305643223344² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1305643223297 and 1305643223306.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40801350714 + ... + 40801350745.

It is an arithmetic number, because the mean of its divisors is an integer number (252968374526).

Almost surely, 2^{1305643223344} is an apocalyptic number.

It is an amenable number.

1305643223344 is a deficient number, since it is larger than the sum of its proper divisors (1224040521916).

1305643223344 is an equidigital number, since it uses as much as digits as its factorization.

1305643223344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81602701467 (or 81602701461 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 40.

Adding to 1305643223344 its reverse (4433223465031), we get a palindrome (5738866688375).

The spelling of 1305643223344 in words is "one trillion, three hundred five billion, six hundred forty-three million, two hundred twenty-three thousand, three hundred forty-four".