225651512560 has 80 divisors (see below), whose sum is σ = 543821220000. Its totient is φ = 86973078528.

The previous prime is 225651512549. The next prime is 225651512591. The reversal of 225651512560 is 65215156522.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1060222 + ... + 1255138.

It is an arithmetic number, because the mean of its divisors is an integer number (6797765250).

Almost surely, 2^225651512560 is an apocalyptic number.

225651512560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225651512560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271910610000).

225651512560 is an abundant number, since it is smaller than the sum of its proper divisors (318169707440).

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

225651512560 is a wasteful number, since it uses less digits than its factorization.

225651512560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195458 (or 195452 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 225651512560 in words is "two hundred twenty-five billion, six hundred fifty-one million, five hundred twelve thousand, five hundred sixty".