81733928874 has 64 divisors (see below), whose sum is σ = 176949964800. Its totient is φ = 25019451072.

The previous prime is 81733928867. The next prime is 81733928897. The reversal of 81733928874 is 47882933718.

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 31 ways as a sum of consecutive naturals, for example, 33237457 + ... + 33239915.

It is an arithmetic number, because the mean of its divisors is an integer number (2764843200).

Almost surely, 2^81733928874 is an apocalyptic number.

81733928874 is an abundant number, since it is smaller than the sum of its proper divisors (95216035926).

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

81733928874 is a wasteful number, since it uses less digits than its factorization.

81733928874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4499.

The product of its digits is 16257024, while the sum is 60.

The spelling of 81733928874 in words is "eighty-one billion, seven hundred thirty-three million, nine hundred twenty-eight thousand, eight hundred seventy-four".