135651657 has 24 divisors (see below), whose sum is σ = 190660288. Its totient is φ = 85726080.

The previous prime is 135651643. The next prime is 135651661. The reversal of 135651657 is 756156531.

It is not a de Polignac number, because 135651657 - 2²² = 131457353 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135651457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186228 + ... + 186954.

Almost surely, 2^135651657 is an apocalyptic number.

It is an amenable number.

135651657 is a deficient number, since it is larger than the sum of its proper divisors (55008631).

135651657 is an equidigital number, since it uses as much as digits as its factorization.

135651657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849 (or 808 counting only the distinct ones).

The product of its digits is 94500, while the sum is 39.

The square root of 135651657 is about 11646.9591310350. The cubic root of 135651657 is about 513.8168800163.

The spelling of 135651657 in words is "one hundred thirty-five million, six hundred fifty-one thousand, six hundred fifty-seven".