135612566 has 4 divisors (see below), whose sum is σ = 203418852. Its totient is φ = 67806282.

The previous prime is 135612563. The next prime is 135612649. The reversal of 135612566 is 665216531.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135612563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33903140 + ... + 33903143.

It is an arithmetic number, because the mean of its divisors is an integer number (50854713).

Almost surely, 2^135612566 is an apocalyptic number.

135612566 is a deficient number, since it is larger than the sum of its proper divisors (67806286).

135612566 is an equidigital number, since it uses as much as digits as its factorization.

135612566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67806285.

The product of its digits is 32400, while the sum is 35.

The square root of 135612566 is about 11645.2808467636. The cubic root of 135612566 is about 513.7675194070.

The spelling of 135612566 in words is "one hundred thirty-five million, six hundred twelve thousand, five hundred sixty-six".