6485871523 has 4 divisors (see below), whose sum is σ = 6486788440. Its totient is φ = 6484954608.

The previous prime is 6485871493. The next prime is 6485871527. The reversal of 6485871523 is 3251785846.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3251785846 = 2 ⋅1625892923.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6485871523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6485871527) 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, 447765 + ... + 462022.

It is an arithmetic number, because the mean of its divisors is an integer number (1621697110).

Almost surely, 2^6485871523 is an apocalyptic number.

6485871523 is a deficient number, since it is larger than the sum of its proper divisors (916917).

6485871523 is an equidigital number, since it uses as much as digits as its factorization.

6485871523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916916.

The product of its digits is 1612800, while the sum is 49.

The square root of 6485871523 is about 80534.9087228638. The cubic root of 6485871523 is about 1864.9024257806.

The spelling of 6485871523 in words is "six billion, four hundred eighty-five million, eight hundred seventy-one thousand, five hundred twenty-three".