225477749779 has 2 divisors, whose sum is σ = 225477749780. Its totient is φ = 225477749778.

The previous prime is 225477749741. The next prime is 225477749797. The reversal of 225477749779 is 977947774522.

Together with next prime (225477749797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225477749779 - 2⁹ = 225477749267 is a prime.

It is not a weakly prime, because it can be changed into another prime (225477749179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112738874889 + 112738874890.

It is an arithmetic number, because the mean of its divisors is an integer number (112738874890).

Almost surely, 2^225477749779 is an apocalyptic number.

225477749779 is a deficient number, since it is larger than the sum of its proper divisors (1).

225477749779 is an equidigital number, since it uses as much as digits as its factorization.

225477749779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435637440, while the sum is 70.

The spelling of 225477749779 in words is "two hundred twenty-five billion, four hundred seventy-seven million, seven hundred forty-nine thousand, seven hundred seventy-nine".