6400726000 has 40 divisors (see below), whose sum is σ = 15476960304. Its totient is φ = 2560289600.

The previous prime is 6400725977. The next prime is 6400726019. The reversal of 6400726000 is 6270046.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1598182 + ... + 1602181.

Almost surely, 2^6400726000 is an apocalyptic number.

It is an amenable number.

6400726000 is an abundant number, since it is smaller than the sum of its proper divisors (9076234304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6400726000 is a wasteful number, since it uses less digits than its factorization.

6400726000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200386 (or 3200370 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 6400726000 is about 80004.5373713266. The cubic root of 6400726000 is about 1856.7057348218.

Adding to 6400726000 its reverse (6270046), we get a palindrome (6406996046).

The spelling of 6400726000 in words is "six billion, four hundred million, seven hundred twenty-six thousand".