135566394 has 16 divisors (see below), whose sum is σ = 271252800. Its totient is φ = 45168800.

The previous prime is 135566371. The next prime is 135566399. The reversal of 135566394 is 493665531.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (135566399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17419 + ... + 23969.

It is an arithmetic number, because the mean of its divisors is an integer number (16953300).

Almost surely, 2^135566394 is an apocalyptic number.

135566394 is an abundant number, since it is smaller than the sum of its proper divisors (135686406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135566394 is a wasteful number, since it uses less digits than its factorization.

135566394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10005.

The product of its digits is 291600, while the sum is 42.

The square root of 135566394 is about 11643.2982440544. The cubic root of 135566394 is about 513.7092053257.

The spelling of 135566394 in words is "one hundred thirty-five million, five hundred sixty-six thousand, three hundred ninety-four".