2147845595809 has 9 divisors (see below), whose sum is σ = 2281647912537. Its totient is φ = 2021478288384.

The previous prime is 2147845595771. The next prime is 2147845595821. The reversal of 2147845595809 is 9085955487412.

The square root of 2147845595809 is 1465553.

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 166868165025 + 1980977430784 = 408495^2 + 1407472^2 .

It is not a de Polignac number, because 2147845595809 - 2⁹ = 2147845595297 is a prime.

It is a super-2 number, since 2×2147845595809² (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 (2147845595839) 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, 24871297 + ... + 24957505.

Almost surely, 2^{2147845595809} is an apocalyptic number.

2147845595809 is the 1465553-rd square number.

2147845595809 is the 732777-th centered octagonal number.

It is an amenable number.

2147845595809 is a deficient number, since it is larger than the sum of its proper divisors (133802316728).

2147845595809 is an frugal number, since it uses more digits than its factorization.

2147845595809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172452 (or 86226 counting only the distinct ones).

The product of its (nonzero) digits is 145152000, while the sum is 67.

The spelling of 2147845595809 in words is "two trillion, one hundred forty-seven billion, eight hundred forty-five million, five hundred ninety-five thousand, eight hundred nine".