6451393756 has 18 divisors (see below), whose sum is σ = 11655746592. Its totient is φ = 3121209360.

The previous prime is 6451393727. The next prime is 6451393757. The reversal of 6451393756 is 6573931546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6451393757) 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 5 ways as a sum of consecutive naturals, for example, 890806 + ... + 898018.

Almost surely, 2^6451393756 is an apocalyptic number.

It is an amenable number.

6451393756 is a deficient number, since it is larger than the sum of its proper divisors (5204352836).

6451393756 is an frugal number, since it uses more digits than its factorization.

6451393756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14461 (or 7246 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 49.

The square root of 6451393756 is about 80320.5686981859. The cubic root of 6451393756 is about 1861.5920538693.

The spelling of 6451393756 in words is "six billion, four hundred fifty-one million, three hundred ninety-three thousand, seven hundred fifty-six".