135581378 has 16 divisors (see below), whose sum is σ = 214924320. Its totient is φ = 63968256.

The previous prime is 135581371. The next prime is 135581399. The reversal of 135581378 is 873185531.

It is not an unprimeable number, because it can be changed into a prime (135581371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2825 + ... + 16707.

It is an arithmetic number, because the mean of its divisors is an integer number (13432770).

Almost surely, 2^135581378 is an apocalyptic number.

135581378 is a deficient number, since it is larger than the sum of its proper divisors (79342942).

135581378 is a wasteful number, since it uses less digits than its factorization.

135581378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14161.

The product of its digits is 100800, while the sum is 41.

The square root of 135581378 is about 11643.9416865596. The cubic root of 135581378 is about 513.7281311940.

The spelling of 135581378 in words is "one hundred thirty-five million, five hundred eighty-one thousand, three hundred seventy-eight".