816743402712 has 128 divisors (see below), whose sum is σ = 2281563187200. Its totient is φ = 270712108800.

The previous prime is 816743402669. The next prime is 816743402731. The reversal of 816743402712 is 217204347618.

816743402712 is a `hidden beast` number, since 81 + 67 + 43 + 402 + 71 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29545137 + ... + 29572767.

It is an arithmetic number, because the mean of its divisors is an integer number (17824712400).

Almost surely, 2^816743402712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 816743402712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1140781593600).

816743402712 is an abundant number, since it is smaller than the sum of its proper divisors (1464819784488).

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

816743402712 is a wasteful number, since it uses less digits than its factorization.

816743402712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28414 (or 28404 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 816743402712 in words is "eight hundred sixteen billion, seven hundred forty-three million, four hundred two thousand, seven hundred twelve".