647398459008 has 320 divisors, whose sum is σ = 2206897704000. Its totient is φ = 184549736448.

The previous prime is 647398459003. The next prime is 647398459027. The reversal of 647398459008 is 800954893746.

647398459008 is a `hidden beast` number, since 6 + 4 + 7 + 39 + 8 + 4 + 590 + 0 + 8 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (647398459003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 32576691 + ... + 32596557.

It is an arithmetic number, because the mean of its divisors is an integer number (6896555325).

Almost surely, 2^647398459008 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 647398459008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1103448852000).

647398459008 is an abundant number, since it is smaller than the sum of its proper divisors (1559499244992).

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

647398459008 is a wasteful number, since it uses less digits than its factorization.

647398459008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20349 (or 20328 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 63.

The spelling of 647398459008 in words is "six hundred forty-seven billion, three hundred ninety-eight million, four hundred fifty-nine thousand, eight".