135785577 has 4 divisors (see below), whose sum is σ = 181047440. Its totient is φ = 90523716.

The previous prime is 135785567. The next prime is 135785603. The reversal of 135785577 is 775587531.

135785577 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 135785577 - 2¹⁰ = 135784553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135785567) 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, 22630927 + ... + 22630932.

It is an arithmetic number, because the mean of its divisors is an integer number (45261860).

Almost surely, 2^135785577 is an apocalyptic number.

It is an amenable number.

135785577 is a deficient number, since it is larger than the sum of its proper divisors (45261863).

135785577 is an equidigital number, since it uses as much as digits as its factorization.

135785577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45261862.

The product of its digits is 1029000, while the sum is 48.

The square root of 135785577 is about 11652.7068529162. The cubic root of 135785577 is about 513.9859103265.

The spelling of 135785577 in words is "one hundred thirty-five million, seven hundred eighty-five thousand, five hundred seventy-seven".