840698274816 has 99 divisors (see below), whose sum is σ = 2427752212483. Its totient is φ = 280203417600.

The previous prime is 840698274809. The next prime is 840698274817. The reversal of 840698274816 is 618472896048.

The square root of 840698274816 is 916896.

It is a perfect power (a square), and thus also a powerful number.

840698274816 is a `hidden beast` number, since 8 + 40 + 6 + 98 + 27 + 481 + 6 = 666.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (840698274817) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 88017241 + ... + 88026791.

Almost surely, 2^840698274816 is an apocalyptic number.

840698274816 is the 916896-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840698274816

840698274816 is an abundant number, since it is smaller than the sum of its proper divisors (1587053937667).

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

840698274816 is an frugal number, since it uses more digits than its factorization.

840698274816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19128 (or 9556 counting only the distinct ones).

The product of its (nonzero) digits is 37158912, while the sum is 63.

The spelling of 840698274816 in words is "eight hundred forty billion, six hundred ninety-eight million, two hundred seventy-four thousand, eight hundred sixteen".