135911645 has 4 divisors (see below), whose sum is σ = 163093980. Its totient is φ = 108729312.

The previous prime is 135911621. The next prime is 135911683. The reversal of 135911645 is 546119531.

135911645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 80766169 + 55145476 = 8987^2 + 7426^2 .

It is a cyclic number.

It is not a de Polignac number, because 135911645 - 2¹⁴ = 135895261 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13591160 + ... + 13591169.

It is an arithmetic number, because the mean of its divisors is an integer number (40773495).

Almost surely, 2^135911645 is an apocalyptic number.

It is an amenable number.

135911645 is a deficient number, since it is larger than the sum of its proper divisors (27182335).

135911645 is an equidigital number, since it uses as much as digits as its factorization.

135911645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27182334.

The product of its digits is 16200, while the sum is 35.

The square root of 135911645 is about 11658.1149848507. The cubic root of 135911645 is about 514.1449285232.

The spelling of 135911645 in words is "one hundred thirty-five million, nine hundred eleven thousand, six hundred forty-five".