81013117680748 has 36 divisors (see below), whose sum is σ = 155862211021776. Its totient is φ = 36817261492000.

The previous prime is 81013117680739. The next prime is 81013117680751. The reversal of 81013117680748 is 84708671131018.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13050415 + ... + 18230182.

It is an arithmetic number, because the mean of its divisors is an integer number (4329505861716).

Almost surely, 2^{81013117680748} is an apocalyptic number.

It is an amenable number.

81013117680748 is a deficient number, since it is larger than the sum of its proper divisors (74849093341028).

81013117680748 is a wasteful number, since it uses less digits than its factorization.

81013117680748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31285974 (or 31285961 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 55.

The spelling of 81013117680748 in words is "eighty-one trillion, thirteen billion, one hundred seventeen million, six hundred eighty thousand, seven hundred forty-eight".