780680813817 has 16 divisors (see below), whose sum is σ = 1089591027840. Its totient is φ = 496255005312.

The previous prime is 780680813813. The next prime is 780680813839. The reversal of 780680813817 is 718318086087.

It is not a de Polignac number, because 780680813817 - 2² = 780680813813 is a prime.

It is not an unprimeable number, because it can be changed into a prime (780680813813) 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 15 ways as a sum of consecutive naturals, for example, 17823892 + ... + 17867637.

It is an arithmetic number, because the mean of its divisors is an integer number (68099439240).

Almost surely, 2^780680813817 is an apocalyptic number.

It is an amenable number.

780680813817 is a deficient number, since it is larger than the sum of its proper divisors (308910214023).

780680813817 is a wasteful number, since it uses less digits than its factorization.

780680813817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35691872.

The product of its (nonzero) digits is 3612672, while the sum is 57.

The spelling of 780680813817 in words is "seven hundred eighty billion, six hundred eighty million, eight hundred thirteen thousand, eight hundred seventeen".