225651437556 has 12 divisors (see below), whose sum is σ = 526520020992. Its totient is φ = 75217145848.

The previous prime is 225651437551. The next prime is 225651437563. The reversal of 225651437556 is 655734156522.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 225651437499 and 225651437508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225651437551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9402143220 + ... + 9402143243.

It is an arithmetic number, because the mean of its divisors is an integer number (43876668416).

Almost surely, 2^225651437556 is an apocalyptic number.

It is an amenable number.

225651437556 is an abundant number, since it is smaller than the sum of its proper divisors (300868583436).

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

225651437556 is a wasteful number, since it uses less digits than its factorization.

225651437556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18804286470 (or 18804286468 counting only the distinct ones).

The product of its digits is 7560000, while the sum is 51.

The spelling of 225651437556 in words is "two hundred twenty-five billion, six hundred fifty-one million, four hundred thirty-seven thousand, five hundred fifty-six".