235378805043581 has 2 divisors, whose sum is σ = 235378805043582. Its totient is φ = 235378805043580.

The previous prime is 235378805043559. The next prime is 235378805043617. The reversal of 235378805043581 is 185340508873532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122826438778681 + 112552366264900 = 11082709^2 + 10609070^2 .

It is a cyclic number.

It is not a de Polignac number, because 235378805043581 - 2¹⁸ = 235378804781437 is a prime.

It is a super-2 number, since 2×235378805043581² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (235378805043181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117689402521790 + 117689402521791.

It is an arithmetic number, because the mean of its divisors is an integer number (117689402521791).

Almost surely, 2^{235378805043581} is an apocalyptic number.

It is an amenable number.

235378805043581 is a deficient number, since it is larger than the sum of its proper divisors (1).

235378805043581 is an equidigital number, since it uses as much as digits as its factorization.

235378805043581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768000, while the sum is 62.

The spelling of 235378805043581 in words is "two hundred thirty-five trillion, three hundred seventy-eight billion, eight hundred five million, forty-three thousand, five hundred eighty-one".