82140173906 has 32 divisors (see below), whose sum is σ = 143734445568. Its totient is φ = 34474714560.

The previous prime is 82140173903. The next prime is 82140173977. The reversal of 82140173906 is 60937104128.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82140173903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299111 + ... + 503733.

It is an arithmetic number, because the mean of its divisors is an integer number (4491701424).

Almost surely, 2^82140173906 is an apocalyptic number.

82140173906 is a deficient number, since it is larger than the sum of its proper divisors (61594271662).

82140173906 is a wasteful number, since it uses less digits than its factorization.

82140173906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205226.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 82140173906 in words is "eighty-two billion, one hundred forty million, one hundred seventy-three thousand, nine hundred six".