225740546460561 has 32 divisors (see below), whose sum is σ = 338944149135360. Its totient is φ = 132398236713600.

The previous prime is 225740546460547. The next prime is 225740546460593. The reversal of 225740546460561 is 165064645047522.

It is not a de Polignac number, because 225740546460561 - 2⁶ = 225740546460497 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (225740546460361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165906741 + ... + 167261853.

It is an arithmetic number, because the mean of its divisors is an integer number (10592004660480).

Almost surely, 2^{225740546460561} is an apocalyptic number.

It is an amenable number.

225740546460561 is a deficient number, since it is larger than the sum of its proper divisors (113203602674799).

225740546460561 is a wasteful number, since it uses less digits than its factorization.

225740546460561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517997.

The product of its (nonzero) digits is 48384000, while the sum is 57.

The spelling of 225740546460561 in words is "two hundred twenty-five trillion, seven hundred forty billion, five hundred forty-six million, four hundred sixty thousand, five hundred sixty-one".