82855199791 has 32 divisors (see below), whose sum is σ = 108945052160. Its totient is φ = 61178426496.

The previous prime is 82855199719. The next prime is 82855199809. The reversal of 82855199791 is 19799155828.

It is not a de Polignac number, because 82855199791 - 2¹¹ = 82855197743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82855199711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 241776 + ... + 473461.

It is an arithmetic number, because the mean of its divisors is an integer number (3404532880).

Almost surely, 2^82855199791 is an apocalyptic number.

82855199791 is a deficient number, since it is larger than the sum of its proper divisors (26089852369).

82855199791 is a wasteful number, since it uses less digits than its factorization.

82855199791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715343.

The product of its digits is 16329600, while the sum is 64.

The spelling of 82855199791 in words is "eighty-two billion, eight hundred fifty-five million, one hundred ninety-nine thousand, seven hundred ninety-one".