135901566 has 24 divisors (see below), whose sum is σ = 309951720. Its totient is φ = 42916176.

The previous prime is 135901523. The next prime is 135901573. The reversal of 135901566 is 665109531.

135901566 is a `hidden beast` number, since 1 + 3 + 5 + 90 + 1 + 566 = 666.

135901566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 135901566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198345 + ... + 199028.

It is an arithmetic number, because the mean of its divisors is an integer number (12914655).

Almost surely, 2^135901566 is an apocalyptic number.

135901566 is an abundant number, since it is smaller than the sum of its proper divisors (174050154).

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

135901566 is a wasteful number, since it uses less digits than its factorization.

135901566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397400 (or 397397 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 135901566 is about 11657.6827028359. The cubic root of 135901566 is about 514.1322188082.

The spelling of 135901566 in words is "one hundred thirty-five million, nine hundred one thousand, five hundred sixty-six".