136556638 has 8 divisors (see below), whose sum is σ = 205416288. Its totient is φ = 68084544.

The previous prime is 136556599. The next prime is 136556639. The reversal of 136556638 is 836655631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 136556594 and 136556603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136556639) 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, 96006 + ... + 97417.

It is an arithmetic number, because the mean of its divisors is an integer number (25677036).

Almost surely, 2^136556638 is an apocalyptic number.

136556638 is a deficient number, since it is larger than the sum of its proper divisors (68859650).

136556638 is a wasteful number, since it uses less digits than its factorization.

136556638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193778.

The product of its digits is 388800, while the sum is 43.

The square root of 136556638 is about 11685.7450768019. The cubic root of 136556638 is about 514.9569675295.

The spelling of 136556638 in words is "one hundred thirty-six million, five hundred fifty-six thousand, six hundred thirty-eight".