6406344251 has 16 divisors (see below), whose sum is σ = 6578020800. Its totient is φ = 6237667200.

The previous prime is 6406344239. The next prime is 6406344253. The reversal of 6406344251 is 1524436046.

It is a cyclic number.

It is not a de Polignac number, because 6406344251 - 2⁶ = 6406344187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6406344253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1547981 + ... + 1552113.

It is an arithmetic number, because the mean of its divisors is an integer number (411126300).

Almost surely, 2^6406344251 is an apocalyptic number.

6406344251 is a deficient number, since it is larger than the sum of its proper divisors (171676549).

6406344251 is a wasteful number, since it uses less digits than its factorization.

6406344251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4486.

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 6406344251 is about 80039.6417470743. The cubic root of 6406344251 is about 1857.2488184379.

The spelling of 6406344251 in words is "six billion, four hundred six million, three hundred forty-four thousand, two hundred fifty-one".