82865859491005 has 16 divisors (see below), whose sum is σ = 100160596421424. Its totient is φ = 65813104161280.

The previous prime is 82865859490963. The next prime is 82865859491029. The reversal of 82865859491005 is 50019495856828.

It can be written as a sum of positive squares in 8 ways, for example, as 14155254948409 + 68710604542596 = 3762347^2 + 8289186^2 .

It is not a de Polignac number, because 82865859491005 - 2⁴⁵ = 47681487402173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90790792 + ... + 91698961.

It is an arithmetic number, because the mean of its divisors is an integer number (6260037276339).

Almost surely, 2^{82865859491005} is an apocalyptic number.

It is an amenable number.

82865859491005 is a deficient number, since it is larger than the sum of its proper divisors (17294736930419).

82865859491005 is a wasteful number, since it uses less digits than its factorization.

82865859491005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182490416.

The product of its (nonzero) digits is 248832000, while the sum is 70.

The spelling of 82865859491005 in words is "eighty-two trillion, eight hundred sixty-five billion, eight hundred fifty-nine million, four hundred ninety-one thousand, five".