8205120722 has 16 divisors (see below), whose sum is σ = 12483863640. Its totient is φ = 4043901312.

The previous prime is 8205120691. The next prime is 8205120727. The reversal of 8205120722 is 2270215028.

It can be written as a sum of positive squares in 4 ways, for example, as 7598434561 + 606686161 = 87169^2 + 24631^2 .

It is not an unprimeable number, because it can be changed into a prime (8205120727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236804 + ... + 269232.

Almost surely, 2^8205120722 is an apocalyptic number.

8205120722 is a deficient number, since it is larger than the sum of its proper divisors (4278742918).

8205120722 is a wasteful number, since it uses less digits than its factorization.

8205120722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34237.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 8205120722 is about 90582.1214258090. The cubic root of 8205120722 is about 2016.9493475410.

The spelling of 8205120722 in words is "eight billion, two hundred five million, one hundred twenty thousand, seven hundred twenty-two".