7226815680 has 672 divisors, whose sum is σ = 30843809280. Its totient is φ = 1560176640.

The previous prime is 7226815679. The next prime is 7226815703. The reversal of 7226815680 is 865186227.

7226815680 is a `hidden beast` number, since 7 + 2 + 2 + 6 + 81 + 568 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 21833115 + ... + 21833445.

Almost surely, 2^7226815680 is an apocalyptic number.

7226815680 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7226815680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15421904640).

7226815680 is an abundant number, since it is smaller than the sum of its proper divisors (23616993600).

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

7226815680 is a wasteful number, since it uses less digits than its factorization.

7226815680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 7226815680 is about 85010.6797996581. The cubic root of 7226815680 is about 1933.3730450292.

The spelling of 7226815680 in words is "seven billion, two hundred twenty-six million, eight hundred fifteen thousand, six hundred eighty".