1306345503506 has 4 divisors (see below), whose sum is σ = 1959518255262. Its totient is φ = 653172751752.

The previous prime is 1306345503479. The next prime is 1306345503521. The reversal of 1306345503506 is 6053055436031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1076769405625 + 229576097881 = 1037675^2 + 479141^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326586375875 + ... + 326586375878.

Almost surely, 2^{1306345503506} is an apocalyptic number.

1306345503506 is a deficient number, since it is larger than the sum of its proper divisors (653172751756).

1306345503506 is an equidigital number, since it uses as much as digits as its factorization.

1306345503506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653172751755.

The product of its (nonzero) digits is 486000, while the sum is 41.

The spelling of 1306345503506 in words is "one trillion, three hundred six billion, three hundred forty-five million, five hundred three thousand, five hundred six".