135777778 has 8 divisors (see below), whose sum is σ = 206706672. Its totient is φ = 66875556.

The previous prime is 135777769. The next prime is 135777779. The reversal of 135777778 is 877777531.

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

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (135777779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 506500 + ... + 506767.

It is an arithmetic number, because the mean of its divisors is an integer number (25838334).

Almost surely, 2^135777778 is an apocalyptic number.

135777778 is a deficient number, since it is larger than the sum of its proper divisors (70928894).

135777778 is a wasteful number, since it uses less digits than its factorization.

135777778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013336.

The product of its digits is 2016840, while the sum is 52.

The square root of 135777778 is about 11652.3722048345. The cubic root of 135777778 is about 513.9760696818.

The spelling of 135777778 in words is "one hundred thirty-five million, seven hundred seventy-seven thousand, seven hundred seventy-eight".