81365474606 has 16 divisors (see below), whose sum is σ = 131482310400. Its totient is φ = 37540217568.

The previous prime is 81365474573. The next prime is 81365474651. The reversal of 81365474606 is 60647456318.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 468641 + ... + 618348.

It is an arithmetic number, because the mean of its divisors is an integer number (8217644400).

Almost surely, 2^81365474606 is an apocalyptic number.

81365474606 is a deficient number, since it is larger than the sum of its proper divisors (50116835794).

81365474606 is a wasteful number, since it uses less digits than its factorization.

81365474606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089883.

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 81365474606 in words is "eighty-one billion, three hundred sixty-five million, four hundred seventy-four thousand, six hundred six".