647102201856 has 608 divisors, whose sum is σ = 2061580369920. Its totient is φ = 178362777600.

The previous prime is 647102201807. The next prime is 647102201861. The reversal of 647102201856 is 658102201746.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (608).

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 31 ways as a sum of consecutive naturals, for example, 5095292865 + ... + 5095292991.

Almost surely, 2^647102201856 is an apocalyptic number.

647102201856 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647102201856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1030790184960).

647102201856 is an abundant number, since it is smaller than the sum of its proper divisors (1414478168064).

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

647102201856 is a wasteful number, since it uses less digits than its factorization.

647102201856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 647102201856 in words is "six hundred forty-seven billion, one hundred two million, two hundred one thousand, eight hundred fifty-six".