811073778 has 8 divisors (see below), whose sum is σ = 1622147568. Its totient is φ = 270357924.

The previous prime is 811073777. The next prime is 811073789. The reversal of 811073778 is 877370118.

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

811073778 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (811073773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67589476 + ... + 67589487.

It is an arithmetic number, because the mean of its divisors is an integer number (202768446).

Almost surely, 2^811073778 is an apocalyptic number.

811073778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

811073778 is a wasteful number, since it uses less digits than its factorization.

811073778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135178968.

The product of its (nonzero) digits is 65856, while the sum is 42.

The square root of 811073778 is about 28479.3570503268. The cubic root of 811073778 is about 932.5814807559.

The spelling of 811073778 in words is "eight hundred eleven million, seventy-three thousand, seven hundred seventy-eight".