82100865057 has 8 divisors (see below), whose sum is σ = 109857386400. Its totient is φ = 54539126880.

The previous prime is 82100865037. The next prime is 82100865061. The reversal of 82100865057 is 75056800128.

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

It is not a de Polignac number, because 82100865057 - 2⁸ = 82100864801 is a prime.

It is a super-2 number, since 2×82100865057² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82100865017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48694807 + ... + 48696492.

It is an arithmetic number, because the mean of its divisors is an integer number (13732173300).

Almost surely, 2^82100865057 is an apocalyptic number.

It is an amenable number.

82100865057 is a deficient number, since it is larger than the sum of its proper divisors (27756521343).

82100865057 is a wasteful number, since it uses less digits than its factorization.

82100865057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97391583.

The product of its (nonzero) digits is 134400, while the sum is 42.

The spelling of 82100865057 in words is "eighty-two billion, one hundred million, eight hundred sixty-five thousand, fifty-seven".