6455549681 has 8 divisors (see below), whose sum is σ = 7466660544. Its totient is φ = 5466661200.

The previous prime is 6455549609. The next prime is 6455549693. The reversal of 6455549681 is 1869455546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6455549681 - 2¹⁸ = 6455287537 is a prime.

It is a super-2 number, since 2×6455549681² = 83348243367718403522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6455549381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5554970 + ... + 5556131.

It is an arithmetic number, because the mean of its divisors is an integer number (933332568).

Almost surely, 2^6455549681 is an apocalyptic number.

It is an amenable number.

6455549681 is a deficient number, since it is larger than the sum of its proper divisors (1011110863).

6455549681 is a wasteful number, since it uses less digits than its factorization.

6455549681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11111191.

The product of its digits is 5184000, while the sum is 53.

The square root of 6455549681 is about 80346.4353969733. The cubic root of 6455549681 is about 1861.9917078849.

The spelling of 6455549681 in words is "six billion, four hundred fifty-five million, five hundred forty-nine thousand, six hundred eighty-one".