7221185776 has 40 divisors (see below), whose sum is σ = 16009734240. Its totient is φ = 3090929664.

The previous prime is 7221185773. The next prime is 7221185813. The reversal of 7221185776 is 6775811227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221185773) 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 7 ways as a sum of consecutive naturals, for example, 50760 + ... + 130456.

It is an arithmetic number, because the mean of its divisors is an integer number (400243356).

Almost surely, 2^7221185776 is an apocalyptic number.

It is an amenable number.

7221185776 is an abundant number, since it is smaller than the sum of its proper divisors (8788548464).

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

7221185776 is a wasteful number, since it uses less digits than its factorization.

7221185776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80521 (or 80515 counting only the distinct ones).

The product of its digits is 329280, while the sum is 46.

The square root of 7221185776 is about 84977.5604262678. The cubic root of 7221185776 is about 1932.8708629318.

The spelling of 7221185776 in words is "seven billion, two hundred twenty-one million, one hundred eighty-five thousand, seven hundred seventy-six".