811080778 has 64 divisors (see below), whose sum is σ = 1406522880. Its totient is φ = 348364800.

The previous prime is 811080773. The next prime is 811080839. The reversal of 811080778 is 877080118.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 811080778.

It is not an unprimeable number, because it can be changed into a prime (811080773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2992783 + ... + 2993053.

It is an arithmetic number, because the mean of its divisors is an integer number (21976920).

Almost surely, 2^811080778 is an apocalyptic number.

811080778 is a deficient number, since it is larger than the sum of its proper divisors (595442102).

811080778 is a wasteful number, since it uses less digits than its factorization.

811080778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463.

The product of its (nonzero) digits is 25088, while the sum is 40.

The square root of 811080778 is about 28479.4799460945. The cubic root of 811080778 is about 932.5841636403.

It can be divided in two parts, 8110 and 80778, that added together give a palindrome (88888).

The spelling of 811080778 in words is "eight hundred eleven million, eighty thousand, seven hundred seventy-eight".