806481103252778 has 8 divisors (see below), whose sum is σ = 1209727824778272. Its totient is φ = 403238494993356.

The previous prime is 806481103252753. The next prime is 806481103252813. The reversal of 806481103252778 is 877252301184608.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 806481103252778.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1027826300 + ... + 1028610647.

It is an arithmetic number, because the mean of its divisors is an integer number (151215978097284).

Almost surely, 2^{806481103252778} is an apocalyptic number.

806481103252778 is a deficient number, since it is larger than the sum of its proper divisors (403246721525494).

806481103252778 is a wasteful number, since it uses less digits than its factorization.

806481103252778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2056633036.

The product of its (nonzero) digits is 36126720, while the sum is 62.

The spelling of 806481103252778 in words is "eight hundred six trillion, four hundred eighty-one billion, one hundred three million, two hundred fifty-two thousand, seven hundred seventy-eight".