647475741440 has 576 divisors, whose sum is σ = 1876780523520. Its totient is φ = 211255296000.

The previous prime is 647475741397. The next prime is 647475741467. The reversal of 647475741440 is 44147574746.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 526830746 + ... + 526831974.

It is an arithmetic number, because the mean of its divisors is an integer number (3258299520).

Almost surely, 2^647475741440 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 647475741440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (938390261760).

647475741440 is an abundant number, since it is smaller than the sum of its proper divisors (1229304782080).

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

647475741440 is a wasteful number, since it uses less digits than its factorization.

647475741440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380 (or 1366 counting only the distinct ones).

The product of its (nonzero) digits is 10536960, while the sum is 53.

The spelling of 647475741440 in words is "six hundred forty-seven billion, four hundred seventy-five million, seven hundred forty-one thousand, four hundred forty".