812551273824 has 48 divisors (see below), whose sum is σ = 2133008337600. Its totient is φ = 270842647680.

The previous prime is 812551273799. The next prime is 812551273871. The reversal of 812551273824 is 428372155218.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3944127 + ... + 4145025.

It is an arithmetic number, because the mean of its divisors is an integer number (44437673700).

Almost surely, 2^812551273824 is an apocalyptic number.

It is an amenable number.

812551273824 is an abundant number, since it is smaller than the sum of its proper divisors (1320457063776).

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

812551273824 is a wasteful number, since it uses less digits than its factorization.

812551273824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243043 (or 243035 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 48.

The spelling of 812551273824 in words is "eight hundred twelve billion, five hundred fifty-one million, two hundred seventy-three thousand, eight hundred twenty-four".