7227257221680 has 160 divisors (see below), whose sum is σ = 22548173181696. Its totient is φ = 1914915935232.

The previous prime is 7227257221649. The next prime is 7227257221687. The reversal of 7227257221680 is 861227527227.

It is a happy number.

It is a super-3 number, since 3×7227257221680³ (a number of 40 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (7227257221687) 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 31 ways as a sum of consecutive naturals, for example, 153444214 + ... + 153491306.

Almost surely, 2^{7227257221680} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7227257221680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11274086590848).

7227257221680 is an abundant number, since it is smaller than the sum of its proper divisors (15320915960016).

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

7227257221680 is a wasteful number, since it uses less digits than its factorization.

7227257221680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51195 (or 51189 counting only the distinct ones).

The product of its (nonzero) digits is 2634240, while the sum is 51.

The spelling of 7227257221680 in words is "seven trillion, two hundred twenty-seven billion, two hundred fifty-seven million, two hundred twenty-one thousand, six hundred eighty".