135656644 has 12 divisors (see below), whose sum is σ = 237869100. Its totient is φ = 67694048.

The previous prime is 135656641. The next prime is 135656669. The reversal of 135656644 is 446656531.

It can be written as a sum of positive squares in 2 ways, for example, as 72454144 + 63202500 = 8512^2 + 7950^2 .

It is a super-2 number, since 2×135656644² = 36805450122685472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 135656597 and 135656606.

It is not an unprimeable number, because it can be changed into a prime (135656641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31279 + ... + 35350.

It is an arithmetic number, because the mean of its divisors is an integer number (19822425).

Almost surely, 2^135656644 is an apocalyptic number.

It is an amenable number.

135656644 is a deficient number, since it is larger than the sum of its proper divisors (102212456).

135656644 is a wasteful number, since it uses less digits than its factorization.

135656644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67142 (or 67140 counting only the distinct ones).

The product of its digits is 259200, while the sum is 40.

The square root of 135656644 is about 11647.1732192837. The cubic root of 135656644 is about 513.8231764706.

The spelling of 135656644 in words is "one hundred thirty-five million, six hundred fifty-six thousand, six hundred forty-four".