6471487655 has 4 divisors (see below), whose sum is σ = 7765785192. Its totient is φ = 5177190120.

The previous prime is 6471487643. The next prime is 6471487681. The reversal of 6471487655 is 5567841746.

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

It is not a de Polignac number, because 6471487655 - 2⁶ = 6471487591 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6471487597 and 6471487606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 647148761 + ... + 647148770.

It is an arithmetic number, because the mean of its divisors is an integer number (1941446298).

Almost surely, 2^6471487655 is an apocalyptic number.

6471487655 is a deficient number, since it is larger than the sum of its proper divisors (1294297537).

6471487655 is a wasteful number, since it uses less digits than its factorization.

6471487655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294297536.

The product of its digits is 5644800, while the sum is 53.

The square root of 6471487655 is about 80445.5570867652. The cubic root of 6471487655 is about 1863.5227929136.

The spelling of 6471487655 in words is "six billion, four hundred seventy-one million, four hundred eighty-seven thousand, six hundred fifty-five".