916199295489 has 9 divisors (see below), whose sum is σ = 1323403130179. Its totient is φ = 610797615960.

The previous prime is 916199295467. The next prime is 916199295497. The reversal of 916199295489 is 984592991619.

The square root of 916199295489 is 957183.

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

It can be written as a sum of positive squares in only one way, i.e., 233691995889 + 682507299600 = 483417^2 + 826140^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 916199295489 - 2¹¹ = 916199293441 is a prime.

It is a super-2 number, since 2×916199295489² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (916199295499) 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, 2712019 + ... + 3031079.

Almost surely, 2^916199295489 is an apocalyptic number.

916199295489 is the 957183-rd square number.

916199295489 is the 478592-nd centered octagonal number.

It is an amenable number.

916199295489 is a deficient number, since it is larger than the sum of its proper divisors (407203834690).

916199295489 is an frugal number, since it uses more digits than its factorization.

916199295489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638128 (or 319064 counting only the distinct ones).

The product of its digits is 113374080, while the sum is 72.

The spelling of 916199295489 in words is "nine hundred sixteen billion, one hundred ninety-nine million, two hundred ninety-five thousand, four hundred eighty-nine".