225978854642 has 54 divisors (see below), whose sum is σ = 358449696423. Its totient is φ = 106843797984.

The previous prime is 225978854641. The next prime is 225978854653. The reversal of 225978854642 is 246458879522.

It can be written as a sum of positive squares in 5 ways, for example, as 208610514121 + 17368340521 = 456739^2 + 131789^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=336139.

Its product of digits (77414400) is a multiple of the sum of its prime factors (540).

It is not an unprimeable number, because it can be changed into a prime (225978854641) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1306236068 + ... + 1306236240.

Almost surely, 2^225978854642 is an apocalyptic number.

225978854642 is a deficient number, since it is larger than the sum of its proper divisors (132470841781).

225978854642 is an frugal number, since it uses more digits than its factorization.

225978854642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 271 counting only the distinct ones).

The product of its digits is 77414400, while the sum is 62.

The spelling of 225978854642 in words is "two hundred twenty-five billion, nine hundred seventy-eight million, eight hundred fifty-four thousand, six hundred forty-two".