8321538436 has 6 divisors (see below), whose sum is σ = 14562692270. Its totient is φ = 4160769216.

The previous prime is 8321538383. The next prime is 8321538451. The reversal of 8321538436 is 6348351238.

It can be written as a sum of positive squares in only one way, i.e., 4401526336 + 3920012100 = 66344^2 + 62610^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8321538392 and 8321538401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1040192301 + ... + 1040192308.

Almost surely, 2^8321538436 is an apocalyptic number.

It is an amenable number.

8321538436 is a deficient number, since it is larger than the sum of its proper divisors (6241153834).

8321538436 is a wasteful number, since it uses less digits than its factorization.

8321538436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080384613 (or 2080384611 counting only the distinct ones).

The product of its digits is 414720, while the sum is 43.

The square root of 8321538436 is about 91222.4667283230. The cubic root of 8321538436 is about 2026.4436942461.

The spelling of 8321538436 in words is "eight billion, three hundred twenty-one million, five hundred thirty-eight thousand, four hundred thirty-six".