6477447745 has 4 divisors (see below), whose sum is σ = 7772937300. Its totient is φ = 5181958192.

The previous prime is 6477447727. The next prime is 6477447751. The reversal of 6477447745 is 5477447746.

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 4920040449 + 1557407296 = 70143^2 + 39464^2 .

It is a cyclic number.

It is not a de Polignac number, because 6477447745 - 2¹¹ = 6477445697 is a prime.

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, 647744770 + ... + 647744779.

It is an arithmetic number, because the mean of its divisors is an integer number (1943234325).

Almost surely, 2^6477447745 is an apocalyptic number.

It is an amenable number.

6477447745 is a deficient number, since it is larger than the sum of its proper divisors (1295489555).

6477447745 is a wasteful number, since it uses less digits than its factorization.

6477447745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295489554.

The product of its digits is 18439680, while the sum is 55.

The square root of 6477447745 is about 80482.5928073891. The cubic root of 6477447745 is about 1864.0947044641.

Subtracting from 6477447745 its reverse (5477447746), we obtain a palindrome (999999999).

The spelling of 6477447745 in words is "six billion, four hundred seventy-seven million, four hundred forty-seven thousand, seven hundred forty-five".