638468000293 has 2 divisors, whose sum is σ = 638468000294. Its totient is φ = 638468000292.

The previous prime is 638468000267. The next prime is 638468000369. The reversal of 638468000293 is 392000864836.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 411608215489 + 226859784804 = 641567^2 + 476298^2 .

It is a cyclic number.

It is not a de Polignac number, because 638468000293 - 2²⁵ = 638434445861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (638468000243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319234000146 + 319234000147.

It is an arithmetic number, because the mean of its divisors is an integer number (319234000147).

Almost surely, 2^638468000293 is an apocalyptic number.

It is an amenable number.

638468000293 is a deficient number, since it is larger than the sum of its proper divisors (1).

638468000293 is an equidigital number, since it uses as much as digits as its factorization.

638468000293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 49.

The spelling of 638468000293 in words is "six hundred thirty-eight billion, four hundred sixty-eight million, two hundred ninety-three", and thus it is an aban number.