82991196082728 has 56 divisors (see below), whose sum is σ = 233306011637850. Its totient is φ = 27663732025632.

The previous prime is 82991196082643. The next prime is 82991196082741. The reversal of 82991196082728 is 82728069119928.

82991196082728 is a `hidden beast` number, since 8 + 2 + 9 + 9 + 1 + 1 + 9 + 608 + 2 + 7 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 54815928673284 + 28175267409444 = 7403778^2 + 5308038^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 7115151583 + ... + 7115163246.

Almost surely, 2^{82991196082728} is an apocalyptic number.

It is an amenable number.

82991196082728 is an abundant number, since it is smaller than the sum of its proper divisors (150314815555122).

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

82991196082728 is a wasteful number, since it uses less digits than its factorization.

82991196082728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14230314853 (or 14230314834 counting only the distinct ones).

The product of its (nonzero) digits is 125411328, while the sum is 72.

The spelling of 82991196082728 in words is "eighty-two trillion, nine hundred ninety-one billion, one hundred ninety-six million, eighty-two thousand, seven hundred twenty-eight".