6381613225 has 27 divisors (see below), whose sum is σ = 8575709583. Its totient is φ = 4708741440.

The previous prime is 6381613171. The next prime is 6381613247. The reversal of 6381613225 is 5223161836.

The square root of 6381613225 is 79885.

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

It can be written as a sum of positive squares in 13 ways, for example, as 2316785689 + 4064827536 = 48133^2 + 63756^2 .

It is not a de Polignac number, because 6381613225 - 2¹¹ = 6381611177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 5191911 + ... + 5193139.

Almost surely, 2^6381613225 is an apocalyptic number.

6381613225 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6381613225 is the 79885-th square number.

6381613225 is the 39943-rd centered octagonal number.

It is an amenable number.

6381613225 is a deficient number, since it is larger than the sum of its proper divisors (2194096358).

6381613225 is an equidigital number, since it uses as much as digits as its factorization.

6381613225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494 (or 1247 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The cubic root of 6381613225 is about 1854.8558311682.

The spelling of 6381613225 in words is "six billion, three hundred eighty-one million, six hundred thirteen thousand, two hundred twenty-five".