7817389056 has 165 divisors, whose sum is σ = 23420539659. Its totient is φ = 2597308416.

The previous prime is 7817389037. The next prime is 7817389057. The reversal of 7817389056 is 6509837187.

The square root of 7817389056 is 88416.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×7817389056² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 7817388993 and 7817389011.

It is not an unprimeable number, because it can be changed into a prime (7817389057) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 25463655 + ... + 25463961.

Almost surely, 2^7817389056 is an apocalyptic number.

7817389056 is the 88416-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7817389056

7817389056 is an abundant number, since it is smaller than the sum of its proper divisors (15603150603).

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

7817389056 is an frugal number, since it uses more digits than its factorization.

7817389056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The cubic root of 7817389056 is about 1984.6651429219.

It can be divided in two parts, 781 and 7389056, that added together give a palindrome (7389837).

The spelling of 7817389056 in words is "seven billion, eight hundred seventeen million, three hundred eighty-nine thousand, fifty-six".