647487585784746 has 144 divisors (see below), whose sum is σ = 1647015386496480. Its totient is φ = 183286936365120.

The previous prime is 647487585784717. The next prime is 647487585784757.

647487585784746 is a `hidden beast` number, since 6 + 4 + 7 + 4 + 87 + 5 + 8 + 57 + 8 + 474 + 6 = 666.

647487585784746 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1482902641 + ... + 1483339211.

It is an arithmetic number, because the mean of its divisors is an integer number (11437606850670).

Almost surely, 2^{647487585784746} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647487585784746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (823507693248240).

647487585784746 is an abundant number, since it is smaller than the sum of its proper divisors (999527800711734).

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

647487585784746 is a wasteful number, since it uses less digits than its factorization.

647487585784746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452129 (or 452119 counting only the distinct ones).

The product of its digits is 283233484800, while the sum is 90.

The spelling of 647487585784746 in words is "six hundred forty-seven trillion, four hundred eighty-seven billion, five hundred eighty-five million, seven hundred eighty-four thousand, seven hundred forty-six".