6400000051 has 4 divisors (see below), whose sum is σ = 6406196632. Its totient is φ = 6393803472.

The previous prime is 6400000049. The next prime is 6400000067. The reversal of 6400000051 is 1500000046.

6400000051 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6400000051 - 2¹ = 6400000049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6399999980 and 6400000034.

It is not an unprimeable number, because it can be changed into a prime (6400000031) 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, 3096741 + ... + 3098806.

It is an arithmetic number, because the mean of its divisors is an integer number (1601549158).

Almost surely, 2^6400000051 is an apocalyptic number.

6400000051 is a deficient number, since it is larger than the sum of its proper divisors (6196581).

6400000051 is a wasteful number, since it uses less digits than its factorization.

6400000051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6196580.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 6400000051 is about 80000.0003187500. Note that the first 3 decimals coincide. The cubic root of 6400000051 is about 1856.6355383768.

Adding to 6400000051 its reverse (1500000046), we get a palindrome (7900000097).

The spelling of 6400000051 in words is "six billion, four hundred million, fifty-one", and thus it is an aban number.