6477138873 has 12 divisors (see below), whose sum is σ = 9906212628. Its totient is φ = 4064087040.

The previous prime is 6477138799. The next prime is 6477138887. The reversal of 6477138873 is 3788317746.

It can be written as a sum of positive squares in 2 ways, for example, as 3172843584 + 3304295289 = 56328^2 + 57483^2 .

It is not a de Polignac number, because 6477138873 - 2⁸ = 6477138617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6477139873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21166968 + ... + 21167273.

It is an arithmetic number, because the mean of its divisors is an integer number (825517719).

Almost surely, 2^6477138873 is an apocalyptic number.

It is an amenable number.

6477138873 is a deficient number, since it is larger than the sum of its proper divisors (3429073755).

6477138873 is a wasteful number, since it uses less digits than its factorization.

6477138873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42334264 (or 42334261 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 54.

The square root of 6477138873 is about 80480.6739099518. The cubic root of 6477138873 is about 1864.0650746966.

The spelling of 6477138873 in words is "six billion, four hundred seventy-seven million, one hundred thirty-eight thousand, eight hundred seventy-three".