225740684950985 has 4 divisors (see below), whose sum is σ = 270888821941188. Its totient is φ = 180592547960784.

The previous prime is 225740684950909. The next prime is 225740684951011. The reversal of 225740684950985 is 589059486047522.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 139215173906704 + 86525511044281 = 11798948^2 + 9301909^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225740684950985 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22574068495094 + ... + 22574068495103.

It is an arithmetic number, because the mean of its divisors is an integer number (67722205485297).

Almost surely, 2^{225740684950985} is an apocalyptic number.

It is an amenable number.

225740684950985 is a deficient number, since it is larger than the sum of its proper divisors (45148136990203).

225740684950985 is an equidigital number, since it uses as much as digits as its factorization.

225740684950985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45148136990202.

The product of its (nonzero) digits is 1741824000, while the sum is 74.

The spelling of 225740684950985 in words is "two hundred twenty-five trillion, seven hundred forty billion, six hundred eighty-four million, nine hundred fifty thousand, nine hundred eighty-five".