81610014968 has 16 divisors (see below), whose sum is σ = 157954868160. Its totient is φ = 39488716800.

The previous prime is 81610014949. The next prime is 81610014979. The reversal of 81610014968 is 86941001618.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164536073 + ... + 164536568.

It is an arithmetic number, because the mean of its divisors is an integer number (9872179260).

Almost surely, 2^81610014968 is an apocalyptic number.

It is an amenable number.

81610014968 is a deficient number, since it is larger than the sum of its proper divisors (76344853192).

81610014968 is a wasteful number, since it uses less digits than its factorization.

81610014968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329072678 (or 329072674 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 44.

The spelling of 81610014968 in words is "eighty-one billion, six hundred ten million, fourteen thousand, nine hundred sixty-eight".