6484995681 has 4 divisors (see below), whose sum is σ = 8646660912. Its totient is φ = 4323330452.

The previous prime is 6484995667. The next prime is 6484995703. The reversal of 6484995681 is 1865994846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6484995681 - 2¹⁰ = 6484994657 is a prime.

It is a super-2 number, since 2×6484995681² = 84110337965177307522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6484995611) 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, 1080832611 + ... + 1080832616.

It is an arithmetic number, because the mean of its divisors is an integer number (2161665228).

Almost surely, 2^6484995681 is an apocalyptic number.

It is an amenable number.

6484995681 is a deficient number, since it is larger than the sum of its proper divisors (2161665231).

6484995681 is a wasteful number, since it uses less digits than its factorization.

6484995681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161665230.

The product of its digits is 14929920, while the sum is 60.

The square root of 6484995681 is about 80529.4708848879. The cubic root of 6484995681 is about 1864.8184774944.

The spelling of 6484995681 in words is "six billion, four hundred eighty-four million, nine hundred ninety-five thousand, six hundred eighty-one".