728510123803391 has 2 divisors, whose sum is σ = 728510123803392. Its totient is φ = 728510123803390.

The previous prime is 728510123803387. The next prime is 728510123803459. The reversal of 728510123803391 is 193308321015827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 728510123803391 - 2² = 728510123803387 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728510123806391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364255061901695 + 364255061901696.

It is an arithmetic number, because the mean of its divisors is an integer number (364255061901696).

Almost surely, 2^{728510123803391} is an apocalyptic number.

728510123803391 is a deficient number, since it is larger than the sum of its proper divisors (1).

728510123803391 is an equidigital number, since it uses as much as digits as its factorization.

728510123803391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 728510123803391 in words is "seven hundred twenty-eight trillion, five hundred ten billion, one hundred twenty-three million, eight hundred three thousand, three hundred ninety-one".