135657543521208 has 64 divisors (see below), whose sum is σ = 350662535838720. Its totient is φ = 43703972652800.

The previous prime is 135657543521191. The next prime is 135657543521237. The reversal of 135657543521208 is 802125345756531.

It is a happy number.

It is a super-2 number, since 2×135657543521208² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 644116008 + ... + 644326583.

It is an arithmetic number, because the mean of its divisors is an integer number (5479102122480).

Almost surely, 2^{135657543521208} is an apocalyptic number.

It is an amenable number.

135657543521208 is an abundant number, since it is smaller than the sum of its proper divisors (215004992317512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135657543521208 is a wasteful number, since it uses less digits than its factorization.

135657543521208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288442748 (or 1288442744 counting only the distinct ones).

The product of its (nonzero) digits is 30240000, while the sum is 57.

The spelling of 135657543521208 in words is "one hundred thirty-five trillion, six hundred fifty-seven billion, five hundred forty-three million, five hundred twenty-one thousand, two hundred eight".