1306111620503 has 4 divisors (see below), whose sum is σ = 1362899082288. Its totient is φ = 1249324158720.

The previous prime is 1306111620439. The next prime is 1306111620521. The reversal of 1306111620503 is 3050261116031.

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

It is a cyclic number.

It is not a de Polignac number, because 1306111620503 - 2⁶ = 1306111620439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306111620533) 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, 28393730858 + ... + 28393730903.

It is an arithmetic number, because the mean of its divisors is an integer number (340724770572).

Almost surely, 2^{1306111620503} is an apocalyptic number.

1306111620503 is a deficient number, since it is larger than the sum of its proper divisors (56787461785).

1306111620503 is an equidigital number, since it uses as much as digits as its factorization.

1306111620503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56787461784.

The product of its (nonzero) digits is 3240, while the sum is 29.

Adding to 1306111620503 its reverse (3050261116031), we get a palindrome (4356372736534).

The spelling of 1306111620503 in words is "one trillion, three hundred six billion, one hundred eleven million, six hundred twenty thousand, five hundred three".