81504760990176 has 96 divisors (see below), whose sum is σ = 237734813998080. Its totient is φ = 27166814299008.

The previous prime is 81504760990123. The next prime is 81504760990231. The reversal of 81504760990176 is 67109906740518.

81504760990176 is a `hidden beast` number, since 8 + 1 + 5 + 0 + 4 + 7 + 609 + 9 + 0 + 17 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 13880785 + ... + 18859631.

It is an arithmetic number, because the mean of its divisors is an integer number (2476404312480).

Almost surely, 2^{81504760990176} is an apocalyptic number.

It is an amenable number.

81504760990176 is an abundant number, since it is smaller than the sum of its proper divisors (156230053007904).

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

81504760990176 is a wasteful number, since it uses less digits than its factorization.

81504760990176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4997813 (or 4997799 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 63.

The spelling of 81504760990176 in words is "eighty-one trillion, five hundred four billion, seven hundred sixty million, nine hundred ninety thousand, one hundred seventy-six".