225705163561556 has 48 divisors (see below), whose sum is σ = 452159665453440. Its totient is φ = 96570243377280.

The previous prime is 225705163561517. The next prime is 225705163561571. The reversal of 225705163561556 is 655165361507522.

It is a happy number.

It is a super-2 number, since 2×225705163561556² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 225705163561495 and 225705163561504.

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, 172709546 + ... + 174011486.

It is an arithmetic number, because the mean of its divisors is an integer number (9419993030280).

Almost surely, 2^{225705163561556} is an apocalyptic number.

It is an amenable number.

225705163561556 is an abundant number, since it is smaller than the sum of its proper divisors (226454501891884).

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

225705163561556 is a wasteful number, since it uses less digits than its factorization.

225705163561556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312224 (or 1312222 counting only the distinct ones).

The product of its (nonzero) digits is 56700000, while the sum is 59.

The spelling of 225705163561556 in words is "two hundred twenty-five trillion, seven hundred five billion, one hundred sixty-three million, five hundred sixty-one thousand, five hundred fifty-six".