81711414988 has 48 divisors (see below), whose sum is σ = 165368044800. Its totient is φ = 34604006976.

The previous prime is 81711414959. The next prime is 81711414989. The reversal of 81711414988 is 88941411718.

It is not an unprimeable number, because it can be changed into a prime (81711414989) 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 15 ways as a sum of consecutive naturals, for example, 1155063 + ... + 1223761.

It is an arithmetic number, because the mean of its divisors is an integer number (3445167600).

Almost surely, 2^81711414988 is an apocalyptic number.

It is an amenable number.

81711414988 is an abundant number, since it is smaller than the sum of its proper divisors (83656629812).

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

81711414988 is a wasteful number, since it uses less digits than its factorization.

81711414988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69214 (or 69212 counting only the distinct ones).

The product of its digits is 516096, while the sum is 52.

The spelling of 81711414988 in words is "eighty-one billion, seven hundred eleven million, four hundred fourteen thousand, nine hundred eighty-eight".