81037104655 has 12 divisors (see below), whose sum is σ = 105300286200. Its totient is φ = 59842784352.

The previous prime is 81037104623. The next prime is 81037104677. The reversal of 81037104655 is 55640173018.

It is a happy number.

It is not a de Polignac number, because 81037104655 - 2⁵ = 81037104623 is a prime.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 47950105 + ... + 47951794.

It is an arithmetic number, because the mean of its divisors is an integer number (8775023850).

Almost surely, 2^81037104655 is an apocalyptic number.

81037104655 is a deficient number, since it is larger than the sum of its proper divisors (24263181545).

81037104655 is a wasteful number, since it uses less digits than its factorization.

81037104655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95901930 (or 95901917 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 81037104655 in words is "eighty-one billion, thirty-seven million, one hundred four thousand, six hundred fifty-five".