6501256003 has 4 divisors (see below), whose sum is σ = 7092279288. Its totient is φ = 5910232720.

The previous prime is 6501256001. The next prime is 6501256009. The reversal of 6501256003 is 3006521056.

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

It is a cyclic number.

It is not a de Polignac number, because 6501256003 - 2¹ = 6501256001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6501256001) 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, 295511626 + ... + 295511647.

It is an arithmetic number, because the mean of its divisors is an integer number (1773069822).

Almost surely, 2^6501256003 is an apocalyptic number.

6501256003 is a deficient number, since it is larger than the sum of its proper divisors (591023285).

6501256003 is a wasteful number, since it uses less digits than its factorization.

6501256003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591023284.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 6501256003 is about 80630.3665066704. The cubic root of 6501256003 is about 1866.3757769544.

Adding to 6501256003 its reverse (3006521056), we get a palindrome (9507777059).

The spelling of 6501256003 in words is "six billion, five hundred one million, two hundred fifty-six thousand, three".