235640538893 has 2 divisors, whose sum is σ = 235640538894. Its totient is φ = 235640538892.

The previous prime is 235640538857. The next prime is 235640538937. The reversal of 235640538893 is 398835046532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164071983364 + 71568555529 = 405058^2 + 267523^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-235640538893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (235640537893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117820269446 + 117820269447.

It is an arithmetic number, because the mean of its divisors is an integer number (117820269447).

Almost surely, 2^235640538893 is an apocalyptic number.

It is an amenable number.

235640538893 is a deficient number, since it is larger than the sum of its proper divisors (1).

235640538893 is an equidigital number, since it uses as much as digits as its factorization.

235640538893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18662400, while the sum is 56.

The spelling of 235640538893 in words is "two hundred thirty-five billion, six hundred forty million, five hundred thirty-eight thousand, eight hundred ninety-three".