135811378 has 8 divisors (see below), whose sum is σ = 203919660. Its totient is φ = 67838160.

The previous prime is 135811339. The next prime is 135811391. The reversal of 135811378 is 873118531.

It can be written as a sum of positive squares in 2 ways, for example, as 128210329 + 7601049 = 11323^2 + 2757^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 31213 + ... + 35296.

Almost surely, 2^135811378 is an apocalyptic number.

135811378 is a deficient number, since it is larger than the sum of its proper divisors (68108282).

135811378 is a wasteful number, since it uses less digits than its factorization.

135811378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67532.

The product of its digits is 20160, while the sum is 37.

The square root of 135811378 is about 11653.8138821589. The cubic root of 135811378 is about 514.0184629017.

The spelling of 135811378 in words is "one hundred thirty-five million, eight hundred eleven thousand, three hundred seventy-eight".