135105587221256 has 32 divisors (see below), whose sum is σ = 253934087542680. Its totient is φ = 67389842419200.

The previous prime is 135105587221237. The next prime is 135105587221259. The reversal of 135105587221256 is 652122785501531.

It can be written as a sum of positive squares in 4 ways, for example, as 58929174253156 + 76176412968100 = 7676534^2 + 8727910^2 .

It is a junction number, because it is equal to n+sod(n) for n = 135105587221198 and 135105587221207.

It is not an unprimeable number, because it can be changed into a prime (135105587221259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92029820 + ... + 93486356.

Almost surely, 2^{135105587221256} is an apocalyptic number.

It is an amenable number.

135105587221256 is a deficient number, since it is larger than the sum of its proper divisors (118828500321424).

135105587221256 is a wasteful number, since it uses less digits than its factorization.

135105587221256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484505 (or 1484501 counting only the distinct ones).

The product of its (nonzero) digits is 5040000, while the sum is 53.

The spelling of 135105587221256 in words is "one hundred thirty-five trillion, one hundred five billion, five hundred eighty-seven million, two hundred twenty-one thousand, two hundred fifty-six".