6256400064 has 56 divisors (see below), whose sum is σ = 16568123328. Its totient is φ = 2083610880.

The previous prime is 6256400021. The next prime is 6256400071. The reversal of 6256400064 is 4600046526.

It is a junction number, because it is equal to n+sod(n) for n = 6256399998 and 6256400034.

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, 210919 + ... + 238745.

Almost surely, 2^6256400064 is an apocalyptic number.

6256400064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6256400064 is an abundant number, since it is smaller than the sum of its proper divisors (10311723264).

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

6256400064 is a wasteful number, since it uses less digits than its factorization.

6256400064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29013 (or 29003 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 6256400064 is about 79097.4087059747. The cubic root of 6256400064 is about 1842.6442824907.

The spelling of 6256400064 in words is "six billion, two hundred fifty-six million, four hundred thousand, sixty-four".