6451574064 has 80 divisors (see below), whose sum is σ = 18165004032. Its totient is φ = 1961167104.

The previous prime is 6451574033. The next prime is 6451574093. The reversal of 6451574064 is 4604751546.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10492 + ... + 114075.

Almost surely, 2^6451574064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6451574064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9082502016).

6451574064 is an abundant number, since it is smaller than the sum of its proper divisors (11713429968).

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

6451574064 is a wasteful number, since it uses less digits than its factorization.

6451574064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124674 (or 124668 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 42.

The square root of 6451574064 is about 80321.6911176551. The cubic root of 6451574064 is about 1861.6093967271.

The spelling of 6451574064 in words is "six billion, four hundred fifty-one million, five hundred seventy-four thousand, sixty-four".