81060552500 has 30 divisors (see below), whose sum is σ = 177263221674. Its totient is φ = 32424220000.

The previous prime is 81060552479. The next prime is 81060552539. The reversal of 81060552500 is 525506018.

It can be written as a sum of positive squares in 5 ways, for example, as 15653512996 + 65407039504 = 125114^2 + 255748^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 16209611 + ... + 16214610.

Almost surely, 2^81060552500 is an apocalyptic number.

It is an amenable number.

81060552500 is an abundant number, since it is smaller than the sum of its proper divisors (96202669174).

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

81060552500 is a wasteful number, since it uses less digits than its factorization.

81060552500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32424245 (or 32424228 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The spelling of 81060552500 in words is "eighty-one billion, sixty million, five hundred fifty-two thousand, five hundred".