225661887361 has 8 divisors (see below), whose sum is σ = 236693347200. Its totient is φ = 214732100352.

The previous prime is 225661887349. The next prime is 225661887377. The reversal of 225661887361 is 163788166522.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225661887361 - 2⁷ = 225661887233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225661887301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25413661 + ... + 25422538.

It is an arithmetic number, because the mean of its divisors is an integer number (29586668400).

Almost surely, 2^225661887361 is an apocalyptic number.

It is an amenable number.

225661887361 is a deficient number, since it is larger than the sum of its proper divisors (11031459839).

225661887361 is a wasteful number, since it uses less digits than its factorization.

225661887361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50836415.

The product of its digits is 5806080, while the sum is 55.

The spelling of 225661887361 in words is "two hundred twenty-five billion, six hundred sixty-one million, eight hundred eighty-seven thousand, three hundred sixty-one".