225640510865 has 32 divisors (see below), whose sum is σ = 344471097600. Its totient is φ = 140659008000.

The previous prime is 225640510861. The next prime is 225640510933. The reversal of 225640510865 is 568015046522.

It is a happy number.

It is not a de Polignac number, because 225640510865 - 2² = 225640510861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225640510861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5961536 + ... + 5999265.

It is an arithmetic number, because the mean of its divisors is an integer number (10764721800).

Almost surely, 2^225640510865 is an apocalyptic number.

It is an amenable number.

225640510865 is a deficient number, since it is larger than the sum of its proper divisors (118830586735).

225640510865 is a wasteful number, since it uses less digits than its factorization.

225640510865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11960838 (or 11960824 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 44.

The spelling of 225640510865 in words is "two hundred twenty-five billion, six hundred forty million, five hundred ten thousand, eight hundred sixty-five".