7225988667840 has 448 divisors, whose sum is σ = 26638938685440. Its totient is φ = 1864765670400.

The previous prime is 7225988667811. The next prime is 7225988667943. The reversal of 7225988667840 is 487668895227.

7225988667840 is a `hidden beast` number, since 7 + 22 + 598 + 8 + 6 + 6 + 7 + 8 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21528505 + ... + 21861575.

Almost surely, 2^{7225988667840} 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 7225988667840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13319469342720).

7225988667840 is an abundant number, since it is smaller than the sum of its proper divisors (19412950017600).

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

7225988667840 is an equidigital number, since it uses as much as digits as its factorization.

7225988667840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333140 (or 333112 counting only the distinct ones).

The product of its (nonzero) digits is 650280960, while the sum is 72.

The spelling of 7225988667840 in words is "seven trillion, two hundred twenty-five billion, nine hundred eighty-eight million, six hundred sixty-seven thousand, eight hundred forty".