648245841437 has 2 divisors, whose sum is σ = 648245841438. Its totient is φ = 648245841436.

The previous prime is 648245841407. The next prime is 648245841461. The reversal of 648245841437 is 734148542846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 570222827161 + 78023014276 = 755131^2 + 279326^2 .

It is a cyclic number.

It is not a de Polignac number, because 648245841437 - 2¹² = 648245837341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648245841407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324122920718 + 324122920719.

It is an arithmetic number, because the mean of its divisors is an integer number (324122920719).

Almost surely, 2^648245841437 is an apocalyptic number.

It is an amenable number.

648245841437 is a deficient number, since it is larger than the sum of its proper divisors (1).

648245841437 is an equidigital number, since it uses as much as digits as its factorization.

648245841437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20643840, while the sum is 56.

The spelling of 648245841437 in words is "six hundred forty-eight billion, two hundred forty-five million, eight hundred forty-one thousand, four hundred thirty-seven".