6471131247 has 36 divisors (see below), whose sum is σ = 10918557936. Its totient is φ = 3682385280.

The previous prime is 6471131201. The next prime is 6471131279. The reversal of 6471131247 is 7421311746.

6471131247 is a `hidden beast` number, since 647 + 1 + 1 + 3 + 1 + 2 + 4 + 7 = 666.

It is not a de Polignac number, because 6471131247 - 2⁷ = 6471131119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6471131287) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 75838 + ... + 136724.

It is an arithmetic number, because the mean of its divisors is an integer number (303293276).

Almost surely, 2^6471131247 is an apocalyptic number.

6471131247 is a deficient number, since it is larger than the sum of its proper divisors (4447426689).

6471131247 is a wasteful number, since it uses less digits than its factorization.

6471131247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61148 (or 61138 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 6471131247 is about 80443.3418438095. The cubic root of 6471131247 is about 1863.4885819944.

The spelling of 6471131247 in words is "six billion, four hundred seventy-one million, one hundred thirty-one thousand, two hundred forty-seven".