225478956578 has 18 divisors (see below), whose sum is σ = 359302134513. Its totient is φ = 106102372000.

The previous prime is 225478956551. The next prime is 225478956583. The reversal of 225478956578 is 875659874522.

It can be written as a sum of positive squares in 2 ways, for example, as 206363958529 + 19114998049 = 454273^2 + 138257^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=335767.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11406203 + ... + 11425953.

Almost surely, 2^225478956578 is an apocalyptic number.

225478956578 is a deficient number, since it is larger than the sum of its proper divisors (133823177935).

225478956578 is an frugal number, since it uses more digits than its factorization.

225478956578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39538 (or 19770 counting only the distinct ones).

The product of its digits is 338688000, while the sum is 68.

The spelling of 225478956578 in words is "two hundred twenty-five billion, four hundred seventy-eight million, nine hundred fifty-six thousand, five hundred seventy-eight".