1304386645691 has 4 divisors (see below), whose sum is σ = 1304406297384. Its totient is φ = 1304366994000.

The previous prime is 1304386645673. The next prime is 1304386645697. The reversal of 1304386645691 is 1965466834031.

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 1304386645691 - 2¹⁴ = 1304386629307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1304386645697) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9725945 + ... + 9859146.

It is an arithmetic number, because the mean of its divisors is an integer number (326101574346).

Almost surely, 2^{1304386645691} is an apocalyptic number.

1304386645691 is a deficient number, since it is larger than the sum of its proper divisors (19651693).

1304386645691 is an equidigital number, since it uses as much as digits as its factorization.

1304386645691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19651692.

The product of its (nonzero) digits is 11197440, while the sum is 56.

The spelling of 1304386645691 in words is "one trillion, three hundred four billion, three hundred eighty-six million, six hundred forty-five thousand, six hundred ninety-one".