794078814321 has 81 divisors (see below), whose sum is σ = 1263303833571. Its totient is φ = 480430020096.

The previous prime is 794078814259. The next prime is 794078814329. The reversal of 794078814321 is 123418870497.

The square root of 794078814321 is 891111.

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

794078814321 is a `hidden beast` number, since 79 + 407 + 8 + 8 + 143 + 21 = 666.

It can be written as a sum of positive squares in 13 ways, for example, as 748181750625 + 45897063696 = 864975^2 + 214236^2 .

It is not a de Polignac number, because 794078814321 - 2¹⁵ = 794078781553 is a prime.

It is a super-2 number, since 2×794078814321² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (794078814329) 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 80 ways as a sum of consecutive naturals, for example, 2536992861 + ... + 2536993173.

Almost surely, 2^794078814321 is an apocalyptic number.

794078814321 is the 891111-st square number.

794078814321 is the 445556-th centered octagonal number.

It is an amenable number.

794078814321 is a deficient number, since it is larger than the sum of its proper divisors (469225019250).

794078814321 is an equidigital number, since it uses as much as digits as its factorization.

794078814321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 794078814321 in words is "seven hundred ninety-four billion, seventy-eight million, eight hundred fourteen thousand, three hundred twenty-one".