355221206036172 has 144 divisors (see below), whose sum is σ = 1075108060895232. Its totient is φ = 96751906859520.

The previous prime is 355221206036159. The next prime is 355221206036197. The reversal of 355221206036172 is 271630602122553.

355221206036172 is a `hidden beast` number, since 3 + 5 + 5 + 2 + 2 + 1 + 20 + 6 + 0 + 3 + 617 + 2 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 338814093 + ... + 339860900.

Almost surely, 2^{355221206036172} is an apocalyptic number.

It is an amenable number.

355221206036172 is an abundant number, since it is smaller than the sum of its proper divisors (719886854859060).

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

355221206036172 is a wasteful number, since it uses less digits than its factorization.

355221206036172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678675108 (or 678675103 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 355221206036172 in words is "three hundred fifty-five trillion, two hundred twenty-one billion, two hundred six million, thirty-six thousand, one hundred seventy-two".