225656505426 has 64 divisors (see below), whose sum is σ = 497387558016. Its totient is φ = 67680384000.

The previous prime is 225656505409. The next prime is 225656505463. The reversal of 225656505426 is 624505656522.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35946600 + ... + 35952876.

It is an arithmetic number, because the mean of its divisors is an integer number (7771680594).

Almost surely, 2^225656505426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225656505426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248693779008).

225656505426 is an abundant number, since it is smaller than the sum of its proper divisors (271731052590).

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

225656505426 is a wasteful number, since it uses less digits than its factorization.

225656505426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11787.

The product of its (nonzero) digits is 4320000, while the sum is 48.

The spelling of 225656505426 in words is "two hundred twenty-five billion, six hundred fifty-six million, five hundred five thousand, four hundred twenty-six".