81932032140 has 96 divisors (see below), whose sum is σ = 262280976384. Its totient is φ = 18720288000.

The previous prime is 81932032099. The next prime is 81932032177. The reversal of 81932032140 is 4123023918.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1126890 + ... + 1197390.

It is an arithmetic number, because the mean of its divisors is an integer number (2732093504).

Almost surely, 2^81932032140 is an apocalyptic number.

It is an amenable number.

81932032140 is an abundant number, since it is smaller than the sum of its proper divisors (180348944244).

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

81932032140 is a wasteful number, since it uses less digits than its factorization.

81932032140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73287 (or 73285 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 81932032140 in words is "eighty-one billion, nine hundred thirty-two million, thirty-two thousand, one hundred forty".