82555827805 has 16 divisors (see below), whose sum is σ = 114430325184. Its totient is φ = 56508801280.

The previous prime is 82555827803. The next prime is 82555827817. The reversal of 82555827805 is 50872855528.

It is not a de Polignac number, because 82555827805 - 2¹ = 82555827803 is a prime.

It is a super-2 number, since 2×82555827805² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82555827803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44146567 + ... + 44148436.

It is an arithmetic number, because the mean of its divisors is an integer number (7151895324).

Almost surely, 2^82555827805 is an apocalyptic number.

82555827805 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

82555827805 is a deficient number, since it is larger than the sum of its proper divisors (31874497379).

82555827805 is a wasteful number, since it uses less digits than its factorization.

82555827805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88295036.

The product of its (nonzero) digits is 8960000, while the sum is 55.

The spelling of 82555827805 in words is "eighty-two billion, five hundred fifty-five million, eight hundred twenty-seven thousand, eight hundred five".