6471920417 has 4 divisors (see below), whose sum is σ = 6852621636. Its totient is φ = 6091219200.

The previous prime is 6471920407. The next prime is 6471920431. The reversal of 6471920417 is 7140291746.

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 2691638161 + 3780282256 = 51881^2 + 61484^2 .

It is a cyclic number.

It is not a de Polignac number, because 6471920417 - 2¹⁰ = 6471919393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6471920407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190350584 + ... + 190350617.

It is an arithmetic number, because the mean of its divisors is an integer number (1713155409).

Almost surely, 2^6471920417 is an apocalyptic number.

It is an amenable number.

6471920417 is a deficient number, since it is larger than the sum of its proper divisors (380701219).

6471920417 is a wasteful number, since it uses less digits than its factorization.

6471920417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380701218.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 6471920417 is about 80448.2468236568. The cubic root of 6471920417 is about 1863.5643312181.

The spelling of 6471920417 in words is "six billion, four hundred seventy-one million, nine hundred twenty thousand, four hundred seventeen".