225005743777 has 2 divisors, whose sum is σ = 225005743778. Its totient is φ = 225005743776.

The previous prime is 225005743763. The next prime is 225005743801. The reversal of 225005743777 is 777347500522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183386071696 + 41619672081 = 428236^2 + 204009^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225005743777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225005743777.

It is not a weakly prime, because it can be changed into another prime (225005743477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112502871888 + 112502871889.

It is an arithmetic number, because the mean of its divisors is an integer number (112502871889).

Almost surely, 2^225005743777 is an apocalyptic number.

It is an amenable number.

225005743777 is a deficient number, since it is larger than the sum of its proper divisors (1).

225005743777 is an equidigital number, since it uses as much as digits as its factorization.

225005743777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2881200, while the sum is 49.

The spelling of 225005743777 in words is "two hundred twenty-five billion, five million, seven hundred forty-three thousand, seven hundred seventy-seven".