648000202189 has 2 divisors, whose sum is σ = 648000202190. Its totient is φ = 648000202188.

The previous prime is 648000202141. The next prime is 648000202273. The reversal of 648000202189 is 981202000846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 434109676900 + 213890525289 = 658870^2 + 462483^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648000202189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648000200189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324000101094 + 324000101095.

It is an arithmetic number, because the mean of its divisors is an integer number (324000101095).

Almost surely, 2^648000202189 is an apocalyptic number.

It is an amenable number.

648000202189 is a deficient number, since it is larger than the sum of its proper divisors (1).

648000202189 is an equidigital number, since it uses as much as digits as its factorization.

648000202189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 648000202189 in words is "six hundred forty-eight billion, two hundred two thousand, one hundred eighty-nine".