6451242686 has 12 divisors (see below), whose sum is σ = 11256760368. Its totient is φ = 2764818252.

The previous prime is 6451242673. The next prime is 6451242689. The reversal of 6451242686 is 6862421546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6451242689) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32914406 + ... + 32914601.

It is an arithmetic number, because the mean of its divisors is an integer number (938063364).

Almost surely, 2^6451242686 is an apocalyptic number.

6451242686 is a deficient number, since it is larger than the sum of its proper divisors (4805517682).

6451242686 is a wasteful number, since it uses less digits than its factorization.

6451242686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65829023 (or 65829016 counting only the distinct ones).

The product of its digits is 552960, while the sum is 44.

The square root of 6451242686 is about 80319.6282735422. The cubic root of 6451242686 is about 1861.5775230089.

The spelling of 6451242686 in words is "six billion, four hundred fifty-one million, two hundred forty-two thousand, six hundred eighty-six".