225723770661 has 16 divisors (see below), whose sum is σ = 308342139840. Its totient is φ = 146794826880.

The previous prime is 225723770659. The next prime is 225723770669. The reversal of 225723770661 is 166077327522.

It is not a de Polignac number, because 225723770661 - 2¹ = 225723770659 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 225723770661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225723770669) 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, 978535 + ... + 1187003.

It is an arithmetic number, because the mean of its divisors is an integer number (19271383740).

Almost surely, 2^225723770661 is an apocalyptic number.

It is an amenable number.

225723770661 is a deficient number, since it is larger than the sum of its proper divisors (82618369179).

225723770661 is a wasteful number, since it uses less digits than its factorization.

225723770661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217316.

The product of its (nonzero) digits is 1481760, while the sum is 48.

The spelling of 225723770661 in words is "two hundred twenty-five billion, seven hundred twenty-three million, seven hundred seventy thousand, six hundred sixty-one".