8409820522 has 4 divisors (see below), whose sum is σ = 12614730786. Its totient is φ = 4204910260.

The previous prime is 8409820513. The next prime is 8409820609. The reversal of 8409820522 is 2250289048.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7796713401 + 613107121 = 88299^2 + 24761^2 .

It is an unprimeable number.

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, 2102455129 + ... + 2102455132.

Almost surely, 2^8409820522 is an apocalyptic number.

8409820522 is a deficient number, since it is larger than the sum of its proper divisors (4204910264).

8409820522 is a wasteful number, since it uses less digits than its factorization.

8409820522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4204910263.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 8409820522 is about 91705.0735891968. The cubic root of 8409820522 is about 2033.5845910478.

The spelling of 8409820522 in words is "eight billion, four hundred nine million, eight hundred twenty thousand, five hundred twenty-two".