6385082881 has 4 divisors (see below), whose sum is σ = 6420359764. Its totient is φ = 6349806000.

The previous prime is 6385082783. The next prime is 6385082941. The reversal of 6385082881 is 1882805836.

It is a happy number.

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 26615281 + 6358467600 = 5159^2 + 79740^2 .

It is a cyclic number.

It is not a de Polignac number, because 6385082881 - 2¹¹ = 6385080833 is a prime.

It is a super-2 number, since 2×6385082881² = 81538566794478520322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6385082381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17638170 + ... + 17638531.

It is an arithmetic number, because the mean of its divisors is an integer number (1605089941).

Almost surely, 2^6385082881 is an apocalyptic number.

It is an amenable number.

6385082881 is a deficient number, since it is larger than the sum of its proper divisors (35276883).

6385082881 is a wasteful number, since it uses less digits than its factorization.

6385082881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35276882.

The product of its (nonzero) digits is 737280, while the sum is 49.

The square root of 6385082881 is about 79906.7136165667. The cubic root of 6385082881 is about 1855.1919293423.

The spelling of 6385082881 in words is "six billion, three hundred eighty-five million, eighty-two thousand, eight hundred eighty-one".