638750132533 has 2 divisors, whose sum is σ = 638750132534. Its totient is φ = 638750132532.

The previous prime is 638750132479. The next prime is 638750132557. The reversal of 638750132533 is 335231057836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 626855394564 + 11894737969 = 791742^2 + 109063^2 .

It is a cyclic number.

It is not a de Polignac number, because 638750132533 - 2⁹ = 638750132021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (638750132333) 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, 319375066266 + 319375066267.

It is an arithmetic number, because the mean of its divisors is an integer number (319375066267).

Almost surely, 2^638750132533 is an apocalyptic number.

It is an amenable number.

638750132533 is a deficient number, since it is larger than the sum of its proper divisors (1).

638750132533 is an equidigital number, since it uses as much as digits as its factorization.

638750132533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 46.

The spelling of 638750132533 in words is "six hundred thirty-eight billion, seven hundred fifty million, one hundred thirty-two thousand, five hundred thirty-three".