135664402 has 4 divisors (see below), whose sum is σ = 203496606. Its totient is φ = 67832200.

The previous prime is 135664393. The next prime is 135664433. The reversal of 135664402 is 204466531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204466531 = 17 ⋅12027443.

It can be written as a sum of positive squares in only one way, i.e., 75151561 + 60512841 = 8669^2 + 7779^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33916099 + ... + 33916102.

Almost surely, 2^135664402 is an apocalyptic number.

135664402 is a deficient number, since it is larger than the sum of its proper divisors (67832204).

135664402 is an equidigital number, since it uses as much as digits as its factorization.

135664402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67832203.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 135664402 is about 11647.5062567058. The cubic root of 135664402 is about 513.8329712095.

The spelling of 135664402 in words is "one hundred thirty-five million, six hundred sixty-four thousand, four hundred two".