1305019738645 has 16 divisors (see below), whose sum is σ = 1789776010368. Its totient is φ = 894853350720.

The previous prime is 1305019738637. The next prime is 1305019738709. The reversal of 1305019738645 is 5468379105031.

It is not a de Polignac number, because 1305019738645 - 2³ = 1305019738637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1305019738592 and 1305019738601.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1626555 + ... + 2292535.

It is an arithmetic number, because the mean of its divisors is an integer number (111861000648).

Almost surely, 2^{1305019738645} is an apocalyptic number.

It is an amenable number.

1305019738645 is a deficient number, since it is larger than the sum of its proper divisors (484756271723).

1305019738645 is an equidigital number, since it uses as much as digits as its factorization.

1305019738645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721980.

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 1305019738645 in words is "one trillion, three hundred five billion, nineteen million, seven hundred thirty-eight thousand, six hundred forty-five".