225765772557 has 16 divisors (see below), whose sum is σ = 324186108288. Its totient is φ = 138928662720.

The previous prime is 225765772511. The next prime is 225765772559. The reversal of 225765772557 is 755277567522.

It is not a de Polignac number, because 225765772557 - 2⁶ = 225765772493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225765772557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225765772559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1734832 + ... + 1860422.

It is an arithmetic number, because the mean of its divisors is an integer number (20261631768).

Almost surely, 2^225765772557 is an apocalyptic number.

It is an amenable number.

225765772557 is a deficient number, since it is larger than the sum of its proper divisors (98420335731).

225765772557 is a wasteful number, since it uses less digits than its factorization.

225765772557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171700.

The product of its digits is 72030000, while the sum is 60.

The spelling of 225765772557 in words is "two hundred twenty-five billion, seven hundred sixty-five million, seven hundred seventy-two thousand, five hundred fifty-seven".