638298732053 has 2 divisors, whose sum is σ = 638298732054. Its totient is φ = 638298732052.

The previous prime is 638298732017. The next prime is 638298732143. The reversal of 638298732053 is 350237892836.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 637022670769 + 1276061284 = 798137^2 + 35722^2 .

It is a cyclic number.

It is not a de Polignac number, because 638298732053 - 2⁶ = 638298731989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 638298732053.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (638298732353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319149366026 + 319149366027.

It is an arithmetic number, because the mean of its divisors is an integer number (319149366027).

Almost surely, 2^638298732053 is an apocalyptic number.

It is an amenable number.

638298732053 is a deficient number, since it is larger than the sum of its proper divisors (1).

638298732053 is an equidigital number, since it uses as much as digits as its factorization.

638298732053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13063680, while the sum is 56.

The spelling of 638298732053 in words is "six hundred thirty-eight billion, two hundred ninety-eight million, seven hundred thirty-two thousand, fifty-three".