82100808447 has 24 divisors (see below), whose sum is σ = 127387112112. Its totient is φ = 46897401600.

The previous prime is 82100808437. The next prime is 82100808479. The reversal of 82100808447 is 74480800128.

It is not a de Polignac number, because 82100808447 - 2⁷ = 82100808319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 82100808399 and 82100808408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82100808407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 301047 + ... + 504807.

It is an arithmetic number, because the mean of its divisors is an integer number (5307796338).

Almost surely, 2^82100808447 is an apocalyptic number.

82100808447 is a deficient number, since it is larger than the sum of its proper divisors (45286303665).

82100808447 is a wasteful number, since it uses less digits than its factorization.

82100808447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206519 (or 206512 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 42.

The spelling of 82100808447 in words is "eighty-two billion, one hundred million, eight hundred eight thousand, four hundred forty-seven".