82188999089721 has 8 divisors (see below), whose sum is σ = 121761480132960. Its totient is φ = 54792666059796.

The previous prime is 82188999089671. The next prime is 82188999089807. The reversal of 82188999089721 is 12798099988128.

It is not a de Polignac number, because 82188999089721 - 2¹³ = 82188999081529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82188999089321) 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, 1522018501635 + ... + 1522018501688.

It is an arithmetic number, because the mean of its divisors is an integer number (15220185016620).

Almost surely, 2^{82188999089721} is an apocalyptic number.

It is an amenable number.

82188999089721 is a deficient number, since it is larger than the sum of its proper divisors (39572481043239).

82188999089721 is a wasteful number, since it uses less digits than its factorization.

82188999089721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3044037003332 (or 3044037003326 counting only the distinct ones).

The product of its (nonzero) digits is 752467968, while the sum is 81.

The spelling of 82188999089721 in words is "eighty-two trillion, one hundred eighty-eight billion, nine hundred ninety-nine million, eighty-nine thousand, seven hundred twenty-one".