647016728553 has 32 divisors (see below), whose sum is σ = 1077159041280. Its totient is φ = 380852651520.

The previous prime is 647016728539. The next prime is 647016728609. The reversal of 647016728553 is 355827610746.

647016728553 is a `hidden beast` number, since 6 + 4 + 7 + 0 + 1 + 67 + 28 + 553 = 666.

It is not a de Polignac number, because 647016728553 - 2⁵ = 647016728521 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 647016728553.

It is not an unprimeable number, because it can be changed into a prime (647016728353) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40064808 + ... + 40080953.

It is an arithmetic number, because the mean of its divisors is an integer number (33661220040).

Almost surely, 2^647016728553 is an apocalyptic number.

It is an amenable number.

647016728553 is a deficient number, since it is larger than the sum of its proper divisors (430142312727).

647016728553 is a wasteful number, since it uses less digits than its factorization.

647016728553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80145806 (or 80145800 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 54.

The spelling of 647016728553 in words is "six hundred forty-seven billion, sixteen million, seven hundred twenty-eight thousand, five hundred fifty-three".