659170243449 has 9 divisors (see below), whose sum is σ = 952138314309. Its totient is φ = 439445205180.

The previous prime is 659170243441. The next prime is 659170243493. The reversal of 659170243449 is 944342071956.

The square root of 659170243449 is 811893.

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

659170243449 is a `hidden beast` number, since 6 + 5 + 9 + 170 + 24 + 3 + 449 = 666.

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

It is not a de Polignac number, because 659170243449 - 2³ = 659170243441 is a prime.

It is a super-2 number, since 2×659170243449² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 659170243395 and 659170243404.

It is not an unprimeable number, because it can be changed into a prime (659170243441) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2300364 + ... + 2570994.

Almost surely, 2^659170243449 is an apocalyptic number.

659170243449 is the 811893-rd square number.

659170243449 is the 405947-th centered octagonal number.

It is an amenable number.

659170243449 is a deficient number, since it is larger than the sum of its proper divisors (292968070860).

659170243449 is an frugal number, since it uses more digits than its factorization.

659170243449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541268 (or 270634 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 659170243449 in words is "six hundred fifty-nine billion, one hundred seventy million, two hundred forty-three thousand, four hundred forty-nine".