6510740251 has 4 divisors (see below), whose sum is σ = 6522643432. Its totient is φ = 6498837072.

The previous prime is 6510740239. The next prime is 6510740273. The reversal of 6510740251 is 1520470156.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6510740251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6510740281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5950770 + ... + 5951863.

It is an arithmetic number, because the mean of its divisors is an integer number (1630660858).

Almost surely, 2^6510740251 is an apocalyptic number.

6510740251 is a deficient number, since it is larger than the sum of its proper divisors (11903181).

6510740251 is a wasteful number, since it uses less digits than its factorization.

6510740251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11903180.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 6510740251 is about 80689.1581998474. The cubic root of 6510740251 is about 1867.2829129501.

The spelling of 6510740251 in words is "six billion, five hundred ten million, seven hundred forty thousand, two hundred fifty-one".