81013545684836 has 24 divisors (see below), whose sum is σ = 143771633401536. Its totient is φ = 39935944996640.

The previous prime is 81013545684781. The next prime is 81013545684839. The reversal of 81013545684836 is 63848654531018.

It is not an unprimeable number, because it can be changed into a prime (81013545684839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37979750 + ... + 40056066.

It is an arithmetic number, because the mean of its divisors is an integer number (5990484725064).

Almost surely, 2^{81013545684836} is an apocalyptic number.

It is an amenable number.

81013545684836 is a deficient number, since it is larger than the sum of its proper divisors (62758087716700).

81013545684836 is a wasteful number, since it uses less digits than its factorization.

81013545684836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213779 (or 2213777 counting only the distinct ones).

The product of its (nonzero) digits is 66355200, while the sum is 62.

The spelling of 81013545684836 in words is "eighty-one trillion, thirteen billion, five hundred forty-five million, six hundred eighty-four thousand, eight hundred thirty-six".