81288048678 has 16 divisors (see below), whose sum is σ = 169644623616. Its totient is φ = 25917928520.

The previous prime is 81288048641. The next prime is 81288048731. The reversal of 81288048678 is 87684088218.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294521778 + ... + 294522053.

It is an arithmetic number, because the mean of its divisors is an integer number (10602788976).

Almost surely, 2^81288048678 is an apocalyptic number.

81288048678 is an abundant number, since it is smaller than the sum of its proper divisors (88356574938).

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

81288048678 is a wasteful number, since it uses less digits than its factorization.

81288048678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589043859.

The product of its (nonzero) digits is 11010048, while the sum is 60.

The spelling of 81288048678 in words is "eighty-one billion, two hundred eighty-eight million, forty-eight thousand, six hundred seventy-eight".