648215406058733 has 2 divisors, whose sum is σ = 648215406058734. Its totient is φ = 648215406058732.

The previous prime is 648215406058709. The next prime is 648215406058793. The reversal of 648215406058733 is 337850604512846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 642041507977444 + 6173898081289 = 25338538^2 + 2484733^2 .

It is a cyclic number.

It is not a de Polignac number, because 648215406058733 - 2¹² = 648215406054637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648215406058793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324107703029366 + 324107703029367.

It is an arithmetic number, because the mean of its divisors is an integer number (324107703029367).

Almost surely, 2^{648215406058733} is an apocalyptic number.

It is an amenable number.

648215406058733 is a deficient number, since it is larger than the sum of its proper divisors (1).

648215406058733 is an equidigital number, since it uses as much as digits as its factorization.

648215406058733 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116121600, while the sum is 62.

The spelling of 648215406058733 in words is "six hundred forty-eight trillion, two hundred fifteen billion, four hundred six million, fifty-eight thousand, seven hundred thirty-three".