6494884578 has 192 divisors, whose sum is σ = 19137710592. Its totient is φ = 1541928960.

The previous prime is 6494884567. The next prime is 6494884597. The reversal of 6494884578 is 8754884946.

6494884578 is a `hidden beast` number, since 6 + 49 + 488 + 45 + 78 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 635388 + ... + 645528.

It is an arithmetic number, because the mean of its divisors is an integer number (99675576).

Almost surely, 2^6494884578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6494884578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9568855296).

6494884578 is an abundant number, since it is smaller than the sum of its proper divisors (12642826014).

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

6494884578 is a wasteful number, since it uses less digits than its factorization.

6494884578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10209 (or 10206 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 63.

The square root of 6494884578 is about 80590.8467383238. The cubic root of 6494884578 is about 1865.7658763412.

The spelling of 6494884578 in words is "six billion, four hundred ninety-four million, eight hundred eighty-four thousand, five hundred seventy-eight".