1935538742689 has 2 divisors, whose sum is σ = 1935538742690. Its totient is φ = 1935538742688.

The previous prime is 1935538742663. The next prime is 1935538742699. The reversal of 1935538742689 is 9862478355391.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1514110562064 + 421428180625 = 1230492^2 + 649175^2 .

It is a cyclic number.

It is not a de Polignac number, because 1935538742689 - 2²⁵ = 1935505188257 is a prime.

It is a super-2 number, since 2×1935538742689² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1935538742629) 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, 967769371344 + 967769371345.

It is an arithmetic number, because the mean of its divisors is an integer number (967769371345).

Almost surely, 2^{1935538742689} is an apocalyptic number.

It is an amenable number.

1935538742689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1935538742689 is an equidigital number, since it uses as much as digits as its factorization.

1935538742689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 391910400, while the sum is 70.

The spelling of 1935538742689 in words is "one trillion, nine hundred thirty-five billion, five hundred thirty-eight million, seven hundred forty-two thousand, six hundred eighty-nine".