647594480128 has 40 divisors (see below), whose sum is σ = 1318337845308. Its totient is φ = 317687844864.

The previous prime is 647594480101. The next prime is 647594480131. The reversal of 647594480128 is 821084495746.

It can be written as a sum of positive squares in 2 ways, for example, as 573061112064 + 74533368064 = 757008^2 + 273008^2 .

It is a super-2 number, since 2×647594480128² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11905251 + ... + 11959522.

Almost surely, 2^647594480128 is an apocalyptic number.

It is an amenable number.

647594480128 is an abundant number, since it is smaller than the sum of its proper divisors (670743365180).

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

647594480128 is an equidigital number, since it uses as much as digits as its factorization.

647594480128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23864844 (or 23864828 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 58.

The spelling of 647594480128 in words is "six hundred forty-seven billion, five hundred ninety-four million, four hundred eighty thousand, one hundred twenty-eight".