647515244401 has 2 divisors, whose sum is σ = 647515244402. Its totient is φ = 647515244400.

The previous prime is 647515244359. The next prime is 647515244417. The reversal of 647515244401 is 104442515746.

647515244401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 630556693776 + 16958550625 = 794076^2 + 130225^2 .

It is a cyclic number.

It is not a de Polignac number, because 647515244401 - 2³³ = 638925309809 is a prime.

It is not a weakly prime, because it can be changed into another prime (647515244501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323757622200 + 323757622201.

It is an arithmetic number, because the mean of its divisors is an integer number (323757622201).

Almost surely, 2^647515244401 is an apocalyptic number.

It is an amenable number.

647515244401 is a deficient number, since it is larger than the sum of its proper divisors (1).

647515244401 is an equidigital number, since it uses as much as digits as its factorization.

647515244401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 537600, while the sum is 43.

The spelling of 647515244401 in words is "six hundred forty-seven billion, five hundred fifteen million, two hundred forty-four thousand, four hundred one".