225706646407 has 4 divisors (see below), whose sum is σ = 246225432456. Its totient is φ = 205187860360.

The previous prime is 225706646359. The next prime is 225706646441. The reversal of 225706646407 is 704646607522.

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

It is a cyclic number.

It is not a de Polignac number, because 225706646407 - 2³¹ = 223559162759 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225706646467) 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, 10259393008 + ... + 10259393029.

It is an arithmetic number, because the mean of its divisors is an integer number (61556358114).

Almost surely, 2^225706646407 is an apocalyptic number.

225706646407 is a deficient number, since it is larger than the sum of its proper divisors (20518786049).

225706646407 is a wasteful number, since it uses less digits than its factorization.

225706646407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20518786048.

The product of its (nonzero) digits is 3386880, while the sum is 49.

The spelling of 225706646407 in words is "two hundred twenty-five billion, seven hundred six million, six hundred forty-six thousand, four hundred seven".