235613240581 has 2 divisors, whose sum is σ = 235613240582. Its totient is φ = 235613240580.

The previous prime is 235613240561. The next prime is 235613240641. The reversal of 235613240581 is 185042316532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160748072356 + 74865168225 = 400934^2 + 273615^2 .

It is a cyclic number.

It is not a de Polignac number, because 235613240581 - 2²¹ = 235611143429 is a prime.

It is a super-2 number, since 2×235613240581² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (235613240531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117806620290 + 117806620291.

It is an arithmetic number, because the mean of its divisors is an integer number (117806620291).

Almost surely, 2^235613240581 is an apocalyptic number.

It is an amenable number.

235613240581 is a deficient number, since it is larger than the sum of its proper divisors (1).

235613240581 is an equidigital number, since it uses as much as digits as its factorization.

235613240581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 235613240581 in words is "two hundred thirty-five billion, six hundred thirteen million, two hundred forty thousand, five hundred eighty-one".