8521522628 has 6 divisors (see below), whose sum is σ = 14912664606. Its totient is φ = 4260761312.

The previous prime is 8521522589. The next prime is 8521522657. The reversal of 8521522628 is 8262251258.

It can be written as a sum of positive squares in only one way, i.e., 6171987844 + 2349534784 = 78562^2 + 48472^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065190325 + ... + 1065190332.

It is an arithmetic number, because the mean of its divisors is an integer number (2485444101).

Almost surely, 2^8521522628 is an apocalyptic number.

It is an amenable number.

8521522628 is a deficient number, since it is larger than the sum of its proper divisors (6391141978).

8521522628 is a wasteful number, since it uses less digits than its factorization.

8521522628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2130380661 (or 2130380659 counting only the distinct ones).

The product of its digits is 153600, while the sum is 41.

The square root of 8521522628 is about 92312.0936172504. The cubic root of 8521522628 is about 2042.5486078740.

The spelling of 8521522628 in words is "eight billion, five hundred twenty-one million, five hundred twenty-two thousand, six hundred twenty-eight".