8522420864 has 16 divisors (see below), whose sum is σ = 16978260570. Its totient is φ = 4261210368.

The previous prime is 8522420861. The next prime is 8522420867. The reversal of 8522420864 is 4680242258.

It is an interprime number because it is at equal distance from previous prime (8522420861) and next prime (8522420867).

It can be written as a sum of positive squares in only one way, i.e., 6854515264 + 1667905600 = 82792^2 + 40840^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (8522420861) 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 as a sum of consecutive naturals, namely, 33290579 + ... + 33290834.

Almost surely, 2^8522420864 is an apocalyptic number.

It is an amenable number.

8522420864 is a deficient number, since it is larger than the sum of its proper divisors (8455839706).

8522420864 is an equidigital number, since it uses as much as digits as its factorization.

8522420864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66581427 (or 66581415 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 41.

The square root of 8522420864 is about 92316.9587020716. The cubic root of 8522420864 is about 2042.6203722879.

The spelling of 8522420864 in words is "eight billion, five hundred twenty-two million, four hundred twenty thousand, eight hundred sixty-four".