8243128455 has 8 divisors (see below), whose sum is σ = 13189005552. Its totient is φ = 4396335168.

The previous prime is 8243128451. The next prime is 8243128489. The reversal of 8243128455 is 5548213428.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8243128455 - 2² = 8243128451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8243128451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274770934 + ... + 274770963.

It is an arithmetic number, because the mean of its divisors is an integer number (1648625694).

Almost surely, 2^8243128455 is an apocalyptic number.

8243128455 is a deficient number, since it is larger than the sum of its proper divisors (4945877097).

8243128455 is a wasteful number, since it uses less digits than its factorization.

8243128455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549541905.

The product of its digits is 307200, while the sum is 42.

The square root of 8243128455 is about 90791.6761327821. The cubic root of 8243128455 is about 2020.0588532178.

The spelling of 8243128455 in words is "eight billion, two hundred forty-three million, one hundred twenty-eight thousand, four hundred fifty-five".