782778080803 has 16 divisors (see below), whose sum is σ = 850626126720. Its totient is φ = 717555444736.

The previous prime is 782778080771. The next prime is 782778080827. The reversal of 782778080803 is 308080877287.

It is not a de Polignac number, because 782778080803 - 2⁵ = 782778080771 is a prime.

It is a super-2 number, since 2×782778080803² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (782778080503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3047323 + ... + 3294196.

It is an arithmetic number, because the mean of its divisors is an integer number (53164132920).

Almost surely, 2^782778080803 is an apocalyptic number.

782778080803 is a deficient number, since it is larger than the sum of its proper divisors (67848045917).

782778080803 is a wasteful number, since it uses less digits than its factorization.

782778080803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6341726.

The product of its (nonzero) digits is 8429568, while the sum is 58.

The spelling of 782778080803 in words is "seven hundred eighty-two billion, seven hundred seventy-eight million, eighty thousand, eight hundred three".