135371778 has 16 divisors (see below), whose sum is σ = 270980640. Its totient is φ = 45084416.

The previous prime is 135371773. The next prime is 135371801. The reversal of 135371778 is 877173531.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (135371773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1968 + ... + 16571.

It is an arithmetic number, because the mean of its divisors is an integer number (16936290).

Almost surely, 2^135371778 is an apocalyptic number.

135371778 is an abundant number, since it is smaller than the sum of its proper divisors (135608862).

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

135371778 is a wasteful number, since it uses less digits than its factorization.

135371778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19761.

The product of its digits is 123480, while the sum is 42.

The square root of 135371778 is about 11634.9378167655. The cubic root of 135371778 is about 513.4632645557.

The spelling of 135371778 in words is "one hundred thirty-five million, three hundred seventy-one thousand, seven hundred seventy-eight".