8557421044249 has 27 divisors (see below), whose sum is σ = 10942067227413. Its totient is φ = 6667944775800.

The previous prime is 8557421044241. The next prime is 8557421044253. The reversal of 8557421044249 is 9424401247558.

The square root of 8557421044249 is 2925307.

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

It is not a de Polignac number, because 8557421044249 - 2³ = 8557421044241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8557421044249.

It is not an unprimeable number, because it can be changed into a prime (8557421044241) 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 26 ways as a sum of consecutive naturals, for example, 225229644 + ... + 225267634.

Almost surely, 2^{8557421044249} is an apocalyptic number.

8557421044249 is the 2925307-th square number.

8557421044249 is the 1462654-th centered octagonal number.

It is an amenable number.

8557421044249 is a deficient number, since it is larger than the sum of its proper divisors (2384646183164).

8557421044249 is an frugal number, since it uses more digits than its factorization.

8557421044249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76018 (or 38009 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 55.

The spelling of 8557421044249 in words is "eight trillion, five hundred fifty-seven billion, four hundred twenty-one million, forty-four thousand, two hundred forty-nine".