81460473706828 has 12 divisors (see below), whose sum is σ = 142555893628680. Its totient is φ = 40730218384352.

The previous prime is 81460473706793. The next prime is 81460473706889. The reversal of 81460473706828 is 82860737406418.

It is a self number, because there is not a number n which added to its sum of digits gives 81460473706828.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 11765088 + ... + 17359096.

It is an arithmetic number, because the mean of its divisors is an integer number (11879657802390).

Almost surely, 2^{81460473706828} is an apocalyptic number.

It is an amenable number.

81460473706828 is a deficient number, since it is larger than the sum of its proper divisors (61095419921852).

81460473706828 is a wasteful number, since it uses less digits than its factorization.

81460473706828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9234536 (or 9234534 counting only the distinct ones).

The product of its (nonzero) digits is 86704128, while the sum is 64.

The spelling of 81460473706828 in words is "eighty-one trillion, four hundred sixty billion, four hundred seventy-three million, seven hundred six thousand, eight hundred twenty-eight".