135778506 has 16 divisors (see below), whose sum is σ = 274096224. Its totient is φ = 44836304.

The previous prime is 135778471. The next prime is 135778523. The reversal of 135778506 is 605877531.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105105 + ... + 106388.

It is an arithmetic number, because the mean of its divisors is an integer number (17131014).

Almost surely, 2^135778506 is an apocalyptic number.

135778506 is an abundant number, since it is smaller than the sum of its proper divisors (138317718).

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

135778506 is a wasteful number, since it uses less digits than its factorization.

135778506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211605.

The product of its (nonzero) digits is 176400, while the sum is 42.

The square root of 135778506 is about 11652.4034430670. The cubic root of 135778506 is about 513.9769882757.

The spelling of 135778506 in words is "one hundred thirty-five million, seven hundred seventy-eight thousand, five hundred six".