135577791 has 6 divisors (see below), whose sum is σ = 195834600. Its totient is φ = 90385188.

The previous prime is 135577759. The next prime is 135577829. The reversal of 135577791 is 197775531.

135577791 is a `hidden beast` number, since 1 + 3 + 5 + 577 + 79 + 1 = 666.

It is not a de Polignac number, because 135577791 - 2⁵ = 135577759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135572791) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7532091 + ... + 7532108.

It is an arithmetic number, because the mean of its divisors is an integer number (32639100).

Almost surely, 2^135577791 is an apocalyptic number.

135577791 is a deficient number, since it is larger than the sum of its proper divisors (60256809).

135577791 is a wasteful number, since it uses less digits than its factorization.

135577791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15064205 (or 15064202 counting only the distinct ones).

The product of its digits is 231525, while the sum is 45.

The square root of 135577791 is about 11643.7876569439. The cubic root of 135577791 is about 513.7236006823.

The spelling of 135577791 in words is "one hundred thirty-five million, five hundred seventy-seven thousand, seven hundred ninety-one".