235666775889 has 14 divisors (see below), whose sum is σ = 353338527906. Its totient is φ = 157111183440.

The previous prime is 235666775867. The next prime is 235666775947. The reversal of 235666775889 is 988577666532.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 138247881489 + 97418894400 = 371817^2 + 312120^2 .

It is not a de Polignac number, because 235666775889 - 2³¹ = 233519292241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (235666775189) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 161636292 + ... + 161637749.

It is an arithmetic number, because the mean of its divisors is an integer number (25238466279).

Almost surely, 2^235666775889 is an apocalyptic number.

It is an amenable number.

235666775889 is a deficient number, since it is larger than the sum of its proper divisors (117671752017).

235666775889 is an frugal number, since it uses more digits than its factorization.

235666775889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323274059 (or 323274044 counting only the distinct ones).

The product of its digits is 914457600, while the sum is 72.

The spelling of 235666775889 in words is "two hundred thirty-five billion, six hundred sixty-six million, seven hundred seventy-five thousand, eight hundred eighty-nine".