81943958060 has 24 divisors (see below), whose sum is σ = 172271244096. Its totient is φ = 32741596160.

The previous prime is 81943958039. The next prime is 81943958113. The reversal of 81943958060 is 6085934918.

It is a junction number, because it is equal to n+sod(n) for n = 81943957993 and 81943958011.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2230517 + ... + 2266956.

It is an arithmetic number, because the mean of its divisors is an integer number (7177968504).

Almost surely, 2^81943958060 is an apocalyptic number.

It is an amenable number.

81943958060 is an abundant number, since it is smaller than the sum of its proper divisors (90327286036).

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

81943958060 is a wasteful number, since it uses less digits than its factorization.

81943958060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4498393 (or 4498391 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 81943958060 in words is "eighty-one billion, nine hundred forty-three million, nine hundred fifty-eight thousand, sixty".