7221687298568 has 12 divisors (see below), whose sum is σ = 13540677936495. Its totient is φ = 3610839848840.

The previous prime is 7221687298543. The next prime is 7221687298577. The reversal of 7221687298568 is 8658927861227.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 3610843649284 + 3610843649284 = 1900222^2 + 1900222^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1900222.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7125833 + ... + 8075943.

Almost surely, 2^{7221687298568} is an apocalyptic number.

It is an amenable number.

7221687298568 is a deficient number, since it is larger than the sum of its proper divisors (6318990637927).

7221687298568 is an frugal number, since it uses more digits than its factorization.

7221687298568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900228 (or 950113 counting only the distinct ones).

The product of its digits is 325140480, while the sum is 71.

The spelling of 7221687298568 in words is "seven trillion, two hundred twenty-one billion, six hundred eighty-seven million, two hundred ninety-eight thousand, five hundred sixty-eight".