494365078321 has 27 divisors (see below), whose sum is σ = 525863884833. Its totient is φ = 464728246560.

The previous prime is 494365078237. The next prime is 494365078397. The reversal of 494365078321 is 123870563494.

It is a happy number.

The square root of 494365078321 is 703111.

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

It can be written as a sum of positive squares in 4 ways, for example, as 35981916721 + 458383161600 = 189689^2 + 677040^2 .

It is not a de Polignac number, because 494365078321 - 2²¹ = 494362981169 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (494365078721) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 806468011 + ... + 806468623.

It is an arithmetic number, because the mean of its divisors is an integer number (19476440179).

It is a 2-persistent number, because it is pandigital, and so is 2⋅494365078321 = 988730156642, but 3⋅494365078321 = 1483095234963 is not.

Almost surely, 2^494365078321 is an apocalyptic number.

494365078321 is the 703111-st square number.

494365078321 is the 351556-th centered octagonal number.

It is an amenable number.

494365078321 is a deficient number, since it is larger than the sum of its proper divisors (31498806512).

494365078321 is an frugal number, since it uses more digits than its factorization.

494365078321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362 (or 681 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 52.

The spelling of 494365078321 in words is "four hundred ninety-four billion, three hundred sixty-five million, seventy-eight thousand, three hundred twenty-one".