6485971769 has 4 divisors (see below), whose sum is σ = 6486164196. Its totient is φ = 6485779344.

The previous prime is 6485971763. The next prime is 6485971781. The reversal of 6485971769 is 9671795846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9671795846 = 2 ⋅4835897923.

It can be written as a sum of positive squares in 2 ways, for example, as 2119405369 + 4366566400 = 46037^2 + 66080^2 .

It is a cyclic number.

It is not a de Polignac number, because 6485971769 - 2¹⁶ = 6485906233 is a prime.

It is a super-2 number, since 2×6485971769² = 84135659576529978722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6485971763) 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, 30854 + ... + 117999.

It is an arithmetic number, because the mean of its divisors is an integer number (1621541049).

Almost surely, 2^6485971769 is an apocalyptic number.

It is an amenable number.

6485971769 is a deficient number, since it is larger than the sum of its proper divisors (192427).

6485971769 is a wasteful number, since it uses less digits than its factorization.

6485971769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192426.

The product of its digits is 22861440, while the sum is 62.

The square root of 6485971769 is about 80535.5310965291. The cubic root of 6485971769 is about 1864.9120337439.

The spelling of 6485971769 in words is "six billion, four hundred eighty-five million, nine hundred seventy-one thousand, seven hundred sixty-nine".