136557577 has 12 divisors (see below), whose sum is σ = 148394700. Its totient is φ = 125606208.

The previous prime is 136557569. The next prime is 136557599. The reversal of 136557577 is 775755631.

It can be written as a sum of positive squares in 6 ways, for example, as 21724921 + 114832656 = 4661^2 + 10716^2 .

It is not a de Polignac number, because 136557577 - 2³ = 136557569 is a prime.

It is a super-2 number, since 2×136557577² = 37295943672221858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136557527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52299 + ... + 54847.

It is an arithmetic number, because the mean of its divisors is an integer number (12366225).

Almost surely, 2^136557577 is an apocalyptic number.

It is an amenable number.

136557577 is a deficient number, since it is larger than the sum of its proper divisors (11837123).

136557577 is a wasteful number, since it uses less digits than its factorization.

136557577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2892 (or 2879 counting only the distinct ones).

The product of its digits is 771750, while the sum is 46.

The square root of 136557577 is about 11685.7852538886. The cubic root of 136557577 is about 514.9581478541.

The spelling of 136557577 in words is "one hundred thirty-six million, five hundred fifty-seven thousand, five hundred seventy-seven".