225687852086861 has 4 divisors (see below), whose sum is σ = 225687883140192. Its totient is φ = 225687821033532.

The previous prime is 225687852086803. The next prime is 225687852086869. The reversal of 225687852086861 is 168680258786522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 225687852086861 - 2¹⁰ = 225687852085837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225687852086869) 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, 1878920 + ... + 21328526.

It is an arithmetic number, because the mean of its divisors is an integer number (56421970785048).

Almost surely, 2^{225687852086861} is an apocalyptic number.

It is an amenable number.

225687852086861 is a deficient number, since it is larger than the sum of its proper divisors (31053331).

225687852086861 is a wasteful number, since it uses less digits than its factorization.

225687852086861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31053330.

The product of its (nonzero) digits is 1238630400, while the sum is 74.

The spelling of 225687852086861 in words is "two hundred twenty-five trillion, six hundred eighty-seven billion, eight hundred fifty-two million, eighty-six thousand, eight hundred sixty-one".