6430328381 has 4 divisors (see below), whose sum is σ = 6455349372. Its totient is φ = 6405307392.

The previous prime is 6430328363. The next prime is 6430328407. The reversal of 6430328381 is 1838230346.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6400800025 + 29528356 = 80005^2 + 5434^2 .

It is a cyclic number.

It is not a de Polignac number, because 6430328381 - 2¹⁴ = 6430311997 is a prime.

It is a super-2 number, since 2×6430328381² = 82698246174988162322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6430328581) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 12510110 + ... + 12510623.

It is an arithmetic number, because the mean of its divisors is an integer number (1613837343).

Almost surely, 2^6430328381 is an apocalyptic number.

It is an amenable number.

6430328381 is a deficient number, since it is larger than the sum of its proper divisors (25020991).

6430328381 is a wasteful number, since it uses less digits than its factorization.

6430328381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25020990.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 6430328381 is about 80189.3283486026. The cubic root of 6430328381 is about 1859.5636604130.

The spelling of 6430328381 in words is "six billion, four hundred thirty million, three hundred twenty-eight thousand, three hundred eighty-one".