81473928748 has 12 divisors (see below), whose sum is σ = 150966397512. Its totient is φ = 38340672320.

The previous prime is 81473928659. The next prime is 81473928761. The reversal of 81473928748 is 84782937418.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599072938 + ... + 599073073.

It is an arithmetic number, because the mean of its divisors is an integer number (12580533126).

Almost surely, 2^81473928748 is an apocalyptic number.

It is an amenable number.

81473928748 is a deficient number, since it is larger than the sum of its proper divisors (69492468764).

81473928748 is a wasteful number, since it uses less digits than its factorization.

81473928748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198146032 (or 1198146030 counting only the distinct ones).

The product of its digits is 21676032, while the sum is 61.

The spelling of 81473928748 in words is "eighty-one billion, four hundred seventy-three million, nine hundred twenty-eight thousand, seven hundred forty-eight".