648223322869 has 2 divisors, whose sum is σ = 648223322870. Its totient is φ = 648223322868.

The previous prime is 648223322821. The next prime is 648223322897. The reversal of 648223322869 is 968223322846.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 522685620900 + 125537701969 = 722970^2 + 354313^2 .

It is a cyclic number.

It is not a de Polignac number, because 648223322869 - 2¹⁵ = 648223290101 is a prime.

It is a super-2 number, since 2×648223322869² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648223322969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324111661434 + 324111661435.

It is an arithmetic number, because the mean of its divisors is an integer number (324111661435).

Almost surely, 2^648223322869 is an apocalyptic number.

It is an amenable number.

648223322869 is a deficient number, since it is larger than the sum of its proper divisors (1).

648223322869 is an equidigital number, since it uses as much as digits as its factorization.

648223322869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11943936, while the sum is 55.

The spelling of 648223322869 in words is "six hundred forty-eight billion, two hundred twenty-three million, three hundred twenty-two thousand, eight hundred sixty-nine".