7226818561 has 8 divisors (see below), whose sum is σ = 7299025344. Its totient is φ = 7154651280.

The previous prime is 7226818553. The next prime is 7226818579. The reversal of 7226818561 is 1658186227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7226818561 - 2³ = 7226818553 is a prime.

It is a super-2 number, since 2×7226818561² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7226818861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475695 + ... + 490651.

It is an arithmetic number, because the mean of its divisors is an integer number (912378168).

Almost surely, 2^7226818561 is an apocalyptic number.

It is an amenable number.

7226818561 is a deficient number, since it is larger than the sum of its proper divisors (72206783).

7226818561 is a wasteful number, since it uses less digits than its factorization.

7226818561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19751.

The product of its digits is 322560, while the sum is 46.

The square root of 7226818561 is about 85010.6967445862. The cubic root of 7226818561 is about 1933.3733019449.

The spelling of 7226818561 in words is "seven billion, two hundred twenty-six million, eight hundred eighteen thousand, five hundred sixty-one".