994585349521 has 9 divisors (see below), whose sum is σ = 1011219169233. Its totient is φ = 978220834320.

The previous prime is 994585349519. The next prime is 994585349531. The reversal of 994585349521 is 125943585499.

The square root of 994585349521 is 997289.

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 683533751121 + 311051598400 = 826761^2 + 557720^2 .

It is not a de Polignac number, because 994585349521 - 2¹ = 994585349519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (994585349531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 60826455 + ... + 60842803.

Almost surely, 2^994585349521 is an apocalyptic number.

994585349521 is the 997289-th square number.

994585349521 is the 498645-th centered octagonal number.

It is an amenable number.

994585349521 is a deficient number, since it is larger than the sum of its proper divisors (16633819712).

994585349521 is an frugal number, since it uses more digits than its factorization.

994585349521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32820 (or 16410 counting only the distinct ones).

The product of its digits is 69984000, while the sum is 64.

Multiplying 994585349521 by its sum of digits (64), we get a square (63653462369344 = 7978312²).

The spelling of 994585349521 in words is "nine hundred ninety-four billion, five hundred eighty-five million, three hundred forty-nine thousand, five hundred twenty-one".