81384474348 has 72 divisors (see below), whose sum is σ = 207992558592. Its totient is φ = 26829578592.

The previous prime is 81384474329. The next prime is 81384474359. The reversal of 81384474348 is 84347448318.

81384474348 is a `hidden beast` number, since 8 + 138 + 4 + 474 + 34 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 81384474294 and 81384474303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2320761 + ... + 2355567.

It is an arithmetic number, because the mean of its divisors is an integer number (2888785536).

Almost surely, 2^81384474348 is an apocalyptic number.

It is an amenable number.

81384474348 is an abundant number, since it is smaller than the sum of its proper divisors (126608084244).

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

81384474348 is a wasteful number, since it uses less digits than its factorization.

81384474348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35531 (or 35526 counting only the distinct ones).

The product of its digits is 8257536, while the sum is 54.

The spelling of 81384474348 in words is "eighty-one billion, three hundred eighty-four million, four hundred seventy-four thousand, three hundred forty-eight".