647053228872 has 108 divisors (see below), whose sum is σ = 1791403165305. Its totient is φ = 210990721536.

The previous prime is 647053228867. The next prime is 647053228873. The reversal of 647053228872 is 278822350746.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

647053228872 is a `hidden beast` number, since 6 + 4 + 7 + 0 + 532 + 28 + 87 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 557193574116 + 89859654756 = 746454^2 + 299766^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=568794.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (647053228873) 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 26 ways as a sum of consecutive naturals, for example, 320798808 + ... + 320800824.

Almost surely, 2^647053228872 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 647053228872

647053228872 is an abundant number, since it is smaller than the sum of its proper divisors (1144349936433).

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

647053228872 is an equidigital number, since it uses as much as digits as its factorization.

647053228872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4140 (or 2069 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 54.

The spelling of 647053228872 in words is "six hundred forty-seven billion, fifty-three million, two hundred twenty-eight thousand, eight hundred seventy-two".