648889588429 has 2 divisors, whose sum is σ = 648889588430. Its totient is φ = 648889588428.

The previous prime is 648889588397. The next prime is 648889588513. The reversal of 648889588429 is 924885988846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 485934468100 + 162955120329 = 697090^2 + 403677^2 .

It is a cyclic number.

It is not a de Polignac number, because 648889588429 - 2⁵ = 648889588397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648889580429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324444794214 + 324444794215.

It is an arithmetic number, because the mean of its divisors is an integer number (324444794215).

Almost surely, 2^648889588429 is an apocalyptic number.

It is an amenable number.

648889588429 is a deficient number, since it is larger than the sum of its proper divisors (1).

648889588429 is an equidigital number, since it uses as much as digits as its factorization.

648889588429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2548039680, while the sum is 79.

The spelling of 648889588429 in words is "six hundred forty-eight billion, eight hundred eighty-nine million, five hundred eighty-eight thousand, four hundred twenty-nine".