812304644139 has 24 divisors (see below), whose sum is σ = 1186253698032. Its totient is φ = 535582987200.

The previous prime is 812304644119. The next prime is 812304644161. The reversal of 812304644139 is 931446403218.

It is not a de Polignac number, because 812304644139 - 2⁸ = 812304643883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 812304644094 and 812304644103.

It is not an unprimeable number, because it can be changed into a prime (812304644119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 331837 + ... + 1317089.

It is an arithmetic number, because the mean of its divisors is an integer number (49427237418).

Almost surely, 2^812304644139 is an apocalyptic number.

812304644139 is a deficient number, since it is larger than the sum of its proper divisors (373949053893).

812304644139 is a wasteful number, since it uses less digits than its factorization.

812304644139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986267 (or 986264 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 812304644139 in words is "eight hundred twelve billion, three hundred four million, six hundred forty-four thousand, one hundred thirty-nine".