647000971776 has 120 divisors (see below), whose sum is σ = 1869961697604. Its totient is φ = 215358259200.

The previous prime is 647000971769. The next prime is 647000971777. The reversal of 647000971776 is 677179000746.

647000971776 is a `hidden beast` number, since 6 + 470 + 0 + 0 + 97 + 17 + 76 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 563364331776 + 83636640000 = 750576^2 + 289200^2 .

It is a super-2 number, since 2×647000971776² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (647000971777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3130060 + ... + 3330356.

Almost surely, 2^647000971776 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 647000971776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (934980848802).

647000971776 is an abundant number, since it is smaller than the sum of its proper divisors (1222960725828).

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

647000971776 is a wasteful number, since it uses less digits than its factorization.

647000971776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201022 (or 201003 counting only the distinct ones).

The product of its (nonzero) digits is 3111696, while the sum is 54.

The spelling of 647000971776 in words is "six hundred forty-seven billion, nine hundred seventy-one thousand, seven hundred seventy-six".