638574142711 has 2 divisors, whose sum is σ = 638574142712. Its totient is φ = 638574142710.

The previous prime is 638574142693. The next prime is 638574142721. The reversal of 638574142711 is 117241475836.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 638574142711 - 2¹¹ = 638574140663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (638574142721) 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, 319287071355 + 319287071356.

It is an arithmetic number, because the mean of its divisors is an integer number (319287071356).

Almost surely, 2^638574142711 is an apocalyptic number.

638574142711 is a deficient number, since it is larger than the sum of its proper divisors (1).

638574142711 is an equidigital number, since it uses as much as digits as its factorization.

638574142711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1128960, while the sum is 49.

The spelling of 638574142711 in words is "six hundred thirty-eight billion, five hundred seventy-four million, one hundred forty-two thousand, seven hundred eleven".