813328278336 has 168 divisors, whose sum is σ = 2762973595200. Its totient is φ = 232379476992.

The previous prime is 813328278313. The next prime is 813328278353. The reversal of 813328278336 is 633872823318.

813328278336 is a `hidden beast` number, since 8 + 1 + 3 + 32 + 8 + 278 + 336 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3626661 + ... + 3844388.

It is an arithmetic number, because the mean of its divisors is an integer number (16446271400).

Almost surely, 2^813328278336 is an apocalyptic number.

It is an amenable number.

813328278336 is an abundant number, since it is smaller than the sum of its proper divisors (1949645316864).

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

813328278336 is an equidigital number, since it uses as much as digits as its factorization.

813328278336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7471083 (or 7471061 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The spelling of 813328278336 in words is "eight hundred thirteen billion, three hundred twenty-eight million, two hundred seventy-eight thousand, three hundred thirty-six".