135643444 has 6 divisors (see below), whose sum is σ = 237376034. Its totient is φ = 67821720.

The previous prime is 135643439. The next prime is 135643523. The reversal of 135643444 is 444346531.

It can be written as a sum of positive squares in only one way, i.e., 72250000 + 63393444 = 8500^2 + 7962^2 .

It is a super-2 number, since 2×135643444² = 36798287800362272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16955427 + ... + 16955434.

Almost surely, 2^135643444 is an apocalyptic number.

It is an amenable number.

135643444 is a deficient number, since it is larger than the sum of its proper divisors (101732590).

135643444 is a wasteful number, since it uses less digits than its factorization.

135643444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33910865 (or 33910863 counting only the distinct ones).

The product of its digits is 69120, while the sum is 34.

The square root of 135643444 is about 11646.6065443974. The cubic root of 135643444 is about 513.8065101634.

Adding to 135643444 its reverse (444346531), we get a palindrome (579989975).

The spelling of 135643444 in words is "one hundred thirty-five million, six hundred forty-three thousand, four hundred forty-four".