81600888896 has 28 divisors (see below), whose sum is σ = 171451869948. Its totient is φ = 38400417792.

The previous prime is 81600888883. The next prime is 81600888899. The reversal of 81600888896 is 69888800618.

It can be written as a sum of positive squares in 2 ways, for example, as 53824000000 + 27776888896 = 232000^2 + 166664^2 .

It is not an unprimeable number, because it can be changed into a prime (81600888899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37499321 + ... + 37501496.

Almost surely, 2^81600888896 is an apocalyptic number.

It is an amenable number.

81600888896 is an abundant number, since it is smaller than the sum of its proper divisors (89850981052).

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

81600888896 is a wasteful number, since it uses less digits than its factorization.

81600888896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75000846 (or 75000836 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 62.

The spelling of 81600888896 in words is "eighty-one billion, six hundred million, eight hundred eighty-eight thousand, eight hundred ninety-six".