135778023578 has 4 divisors (see below), whose sum is σ = 203667035370. Its totient is φ = 67889011788.

The previous prime is 135778023529. The next prime is 135778023587. The reversal of 135778023578 is 875320877531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 875320877531 = 8527 ⋅102652853.

It can be written as a sum of positive squares in only one way, i.e., 115706784649 + 20071238929 = 340157^2 + 141673^2 .

It is a super-3 number, since 3×135778023578³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33944505893 + ... + 33944505896.

Almost surely, 2^135778023578 is an apocalyptic number.

135778023578 is a deficient number, since it is larger than the sum of its proper divisors (67889011792).

135778023578 is an equidigital number, since it uses as much as digits as its factorization.

135778023578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67889011791.

The product of its (nonzero) digits is 9878400, while the sum is 56.

The spelling of 135778023578 in words is "one hundred thirty-five billion, seven hundred seventy-eight million, twenty-three thousand, five hundred seventy-eight".