82040041991 has 8 divisors (see below), whose sum is σ = 86973315840. Its totient is φ = 77118700288.

The previous prime is 82040041987. The next prime is 82040042129. The reversal of 82040041991 is 19914004028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82040041991 - 2² = 82040041987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82040041961) 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, 2968871 + ... + 2996376.

It is an arithmetic number, because the mean of its divisors is an integer number (10871664480).

Almost surely, 2^82040041991 is an apocalyptic number.

82040041991 is a deficient number, since it is larger than the sum of its proper divisors (4933273849).

82040041991 is a wasteful number, since it uses less digits than its factorization.

82040041991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5966073.

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 82040041991 in words is "eighty-two billion, forty million, forty-one thousand, nine hundred ninety-one".