135655657 has 4 divisors (see below), whose sum is σ = 135680596. Its totient is φ = 135630720.

The previous prime is 135655627. The next prime is 135655661. The reversal of 135655657 is 756556531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 756556531 = 6863 ⋅110237.

It can be written as a sum of positive squares in 2 ways, for example, as 88059456 + 47596201 = 9384^2 + 6899^2 .

It is a cyclic number.

It is not a de Polignac number, because 135655657 - 2¹⁹ = 135131369 is a prime.

It is a super-2 number, since 2×135655657² = 36804914552203298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135655627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444 + ... + 16477.

It is an arithmetic number, because the mean of its divisors is an integer number (33920149).

Almost surely, 2^135655657 is an apocalyptic number.

It is an amenable number.

135655657 is a deficient number, since it is larger than the sum of its proper divisors (24939).

135655657 is an equidigital number, since it uses as much as digits as its factorization.

135655657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24938.

The product of its digits is 472500, while the sum is 43.

The square root of 135655657 is about 11647.1308484107. The cubic root of 135655657 is about 513.8219303228.

The spelling of 135655657 in words is "one hundred thirty-five million, six hundred fifty-five thousand, six hundred fifty-seven".