225645225637 has 32 divisors (see below), whose sum is σ = 245979095040. Its totient is φ = 205758463680.

The previous prime is 225645225581. The next prime is 225645225643. The reversal of 225645225637 is 736522546522.

It is a cyclic number.

It is not a de Polignac number, because 225645225637 - 2¹⁹ = 225644701349 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 (225645225437) 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, 326548462 + ... + 326549152.

It is an arithmetic number, because the mean of its divisors is an integer number (7686846720).

Almost surely, 2^225645225637 is an apocalyptic number.

It is an amenable number.

225645225637 is a deficient number, since it is larger than the sum of its proper divisors (20333869403).

225645225637 is a wasteful number, since it uses less digits than its factorization.

225645225637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633.

The product of its digits is 6048000, while the sum is 49.

The spelling of 225645225637 in words is "two hundred twenty-five billion, six hundred forty-five million, two hundred twenty-five thousand, six hundred thirty-seven".