8453526821 has 16 divisors (see below), whose sum is σ = 8874909120. Its totient is φ = 8042993280.

The previous prime is 8453526799. The next prime is 8453526833. The reversal of 8453526821 is 1286253548.

It is a cyclic number.

It is not a de Polignac number, because 8453526821 - 2¹⁴ = 8453510437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8453522821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1246586 + ... + 1253348.

It is an arithmetic number, because the mean of its divisors is an integer number (554681820).

Almost surely, 2^8453526821 is an apocalyptic number.

It is an amenable number.

8453526821 is a deficient number, since it is larger than the sum of its proper divisors (421382299).

8453526821 is a wasteful number, since it uses less digits than its factorization.

8453526821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7556.

The product of its digits is 460800, while the sum is 44.

The square root of 8453526821 is about 91943.0629302722. The cubic root of 8453526821 is about 2037.1013893260.

The spelling of 8453526821 in words is "eight billion, four hundred fifty-three million, five hundred twenty-six thousand, eight hundred twenty-one".