7220771508 has 12 divisors (see below), whose sum is σ = 16848466880. Its totient is φ = 2406923832.

The previous prime is 7220771507. The next prime is 7220771513. The reversal of 7220771508 is 8051770227.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220771507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300865468 + ... + 300865491.

Almost surely, 2^7220771508 is an apocalyptic number.

It is an amenable number.

7220771508 is an abundant number, since it is smaller than the sum of its proper divisors (9627695372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7220771508 is a wasteful number, since it uses less digits than its factorization.

7220771508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601730966 (or 601730964 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 39.

The square root of 7220771508 is about 84975.1228772280. The cubic root of 7220771508 is about 1932.8339003108.

The spelling of 7220771508 in words is "seven billion, two hundred twenty million, seven hundred seventy-one thousand, five hundred eight".