81760196700 has 432 divisors, whose sum is σ = 325597382656. Its totient is φ = 16693516800.

The previous prime is 81760196659. The next prime is 81760196701. The reversal of 81760196700 is 769106718.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81760196701) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2522799 + ... + 2555001.

Almost surely, 2^81760196700 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81760196700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162798691328).

81760196700 is an abundant number, since it is smaller than the sum of its proper divisors (243837185956).

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

81760196700 is a wasteful number, since it uses less digits than its factorization.

81760196700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32274 (or 32264 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The spelling of 81760196700 in words is "eighty-one billion, seven hundred sixty million, one hundred ninety-six thousand, seven hundred".