7809124059361 has 3 divisors (see below), whose sum is σ = 7809126853843. Its totient is φ = 7809121264880.

The previous prime is 7809124059337. The next prime is 7809124059367. The reversal of 7809124059361 is 1639504219087.

It is a happy number.

The square root of 7809124059361 is 2794481.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 81613633761 + 7727510425600 = 285681^2 + 2779840^2 .

It is not a de Polignac number, because 7809124059361 - 2¹⁷ = 7809123928289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7809124059367) 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 2 ways as a sum of consecutive naturals, for example, 1397241 + ... + 4191721.

It is a 1-persistent number, because it is pandigital, but 2⋅7809124059361 = 15618248118722 is not.

Almost surely, 2^{7809124059361} is an apocalyptic number.

7809124059361 is the 2794481-st square number.

7809124059361 is the 1397241-st centered octagonal number.

It is an amenable number.

7809124059361 is a deficient number, since it is larger than the sum of its proper divisors (2794482).

7809124059361 is an frugal number, since it uses more digits than its factorization.

7809124059361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5588962 (or 2794481 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 7809124059361 in words is "seven trillion, eight hundred nine billion, one hundred twenty-four million, fifty-nine thousand, three hundred sixty-one".