225724494915820 has 48 divisors (see below), whose sum is σ = 474209777347488. Its totient is φ = 90253926927360.

The previous prime is 225724494915769. The next prime is 225724494915827. The reversal of 225724494915820 is 28519494427522.

It is not an unprimeable number, because it can be changed into a prime (225724494915827) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1504644615 + ... + 1504794625.

It is an arithmetic number, because the mean of its divisors is an integer number (9879370361406).

Almost surely, 2^{225724494915820} is an apocalyptic number.

225724494915820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225724494915820 is an abundant number, since it is smaller than the sum of its proper divisors (248485282431668).

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

225724494915820 is a wasteful number, since it uses less digits than its factorization.

225724494915820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179410 (or 179408 counting only the distinct ones).

The product of its (nonzero) digits is 116121600, while the sum is 64.

The spelling of 225724494915820 in words is "two hundred twenty-five trillion, seven hundred twenty-four billion, four hundred ninety-four million, nine hundred fifteen thousand, eight hundred twenty".