8644521454 has 16 divisors (see below), whose sum is σ = 13733874000. Its totient is φ = 4066724224.

The previous prime is 8644521451. The next prime is 8644521481. The reversal of 8644521454 is 4541254468.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 8644521454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8644521451) 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, 73632 + ... + 150700.

It is an arithmetic number, because the mean of its divisors is an integer number (858367125).

Almost surely, 2^8644521454 is an apocalyptic number.

8644521454 is a deficient number, since it is larger than the sum of its proper divisors (5089352546).

8644521454 is a wasteful number, since it uses less digits than its factorization.

8644521454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80387.

The product of its digits is 614400, while the sum is 43.

The square root of 8644521454 is about 92975.9186779028. The cubic root of 8644521454 is about 2052.3290169976.

The spelling of 8644521454 in words is "eight billion, six hundred forty-four million, five hundred twenty-one thousand, four hundred fifty-four".