281306996478 has 12 divisors (see below), whose sum is σ = 609498492408. Its totient is φ = 93768998820.

The previous prime is 281306996473. The next prime is 281306996587. The reversal of 281306996478 is 874699603182.

281306996478 is a `hidden beast` number, since 2 + 8 + 13 + 0 + 69 + 96 + 478 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281306996473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7814083218 + ... + 7814083253.

It is an arithmetic number, because the mean of its divisors is an integer number (50791541034).

Almost surely, 2^281306996478 is an apocalyptic number.

281306996478 is an abundant number, since it is smaller than the sum of its proper divisors (328191495930).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

281306996478 is a wasteful number, since it uses less digits than its factorization.

281306996478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15628166479 (or 15628166476 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 281306996478 in words is "two hundred eighty-one billion, three hundred six million, nine hundred ninety-six thousand, four hundred seventy-eight".