6477517657 has 4 divisors (see below), whose sum is σ = 6975788260. Its totient is φ = 5979247056.

The previous prime is 6477517637. The next prime is 6477517661. The reversal of 6477517657 is 7567157746.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4333457241 + 2144060416 = 65829^2 + 46304^2 .

It is a cyclic number.

It is not a de Polignac number, because 6477517657 - 2¹⁵ = 6477484889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6477517598 and 6477517607.

It is not an unprimeable number, because it can be changed into a prime (6477517637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249135282 + ... + 249135307.

It is an arithmetic number, because the mean of its divisors is an integer number (1743947065).

Almost surely, 2^6477517657 is an apocalyptic number.

It is an amenable number.

6477517657 is a deficient number, since it is larger than the sum of its proper divisors (498270603).

6477517657 is a wasteful number, since it uses less digits than its factorization.

6477517657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498270602.

The product of its digits is 8643600, while the sum is 55.

The square root of 6477517657 is about 80483.0271361608. The cubic root of 6477517657 is about 1864.1014109183.

The spelling of 6477517657 in words is "six billion, four hundred seventy-seven million, five hundred seventeen thousand, six hundred fifty-seven".