81486308504 has 16 divisors (see below), whose sum is σ = 152789868000. Its totient is φ = 40742343712.

The previous prime is 81486308483. The next prime is 81486308509. The reversal of 81486308504 is 40580368418.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81486308509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684074 + ... + 794310.

It is an arithmetic number, because the mean of its divisors is an integer number (9549366750).

Almost surely, 2^81486308504 is an apocalyptic number.

It is an amenable number.

81486308504 is a deficient number, since it is larger than the sum of its proper divisors (71303559496).

81486308504 is a wasteful number, since it uses less digits than its factorization.

81486308504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202642 (or 202638 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 47.

The spelling of 81486308504 in words is "eighty-one billion, four hundred eighty-six million, three hundred eight thousand, five hundred four".