1680304507813 has 4 divisors (see below), whose sum is σ = 1753361225568. Its totient is φ = 1607247790060.

The previous prime is 1680304507753. The next prime is 1680304507823. The reversal of 1680304507813 is 3187054030861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1680304507813 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 (1680304507823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36528358843 + ... + 36528358888.

It is an arithmetic number, because the mean of its divisors is an integer number (438340306392).

Almost surely, 2^{1680304507813} is an apocalyptic number.

It is an amenable number.

1680304507813 is a deficient number, since it is larger than the sum of its proper divisors (73056717755).

1680304507813 is an equidigital number, since it uses as much as digits as its factorization.

1680304507813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73056717754.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 1680304507813 in words is "one trillion, six hundred eighty billion, three hundred four million, five hundred seven thousand, eight hundred thirteen".