7226581720 has 32 divisors (see below), whose sum is σ = 16637947920. Its totient is φ = 2823408000.

The previous prime is 7226581639. The next prime is 7226581727. The reversal of 7226581720 is 271856227.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7226581727) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 2099031 + ... + 2102470.

Almost surely, 2^7226581720 is an apocalyptic number.

It is an amenable number.

7226581720 is an abundant number, since it is smaller than the sum of its proper divisors (9411366200).

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

7226581720 is a wasteful number, since it uses less digits than its factorization.

7226581720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4201555 (or 4201551 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 7226581720 is about 85009.3037261216. The cubic root of 7226581720 is about 1933.3521812141.

The spelling of 7226581720 in words is "seven billion, two hundred twenty-six million, five hundred eighty-one thousand, seven hundred twenty".