135606646565421 has 32 divisors (see below), whose sum is σ = 184076903859840. Its totient is φ = 88775404723200.

The previous prime is 135606646565389. The next prime is 135606646565459. The reversal of 135606646565421 is 124565646606531.

It is a happy number.

It is not a de Polignac number, because 135606646565421 - 2⁵ = 135606646565389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135606646565321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 356751361 + ... + 357131273.

It is an arithmetic number, because the mean of its divisors is an integer number (5752403245620).

Almost surely, 2^{135606646565421} is an apocalyptic number.

It is an amenable number.

135606646565421 is a deficient number, since it is larger than the sum of its proper divisors (48470257294419).

135606646565421 is a wasteful number, since it uses less digits than its factorization.

135606646565421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383197.

The product of its (nonzero) digits is 93312000, while the sum is 60.

The spelling of 135606646565421 in words is "one hundred thirty-five trillion, six hundred six billion, six hundred forty-six million, five hundred sixty-five thousand, four hundred twenty-one".