86042640209 has 32 divisors (see below), whose sum is σ = 99167846400. Its totient is φ = 74112779520.

The previous prime is 86042640199. The next prime is 86042640251. The reversal of 86042640209 is 90204624068.

It is a cyclic number.

It is not a de Polignac number, because 86042640209 - 2³² = 81747672913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86042640259) 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, 5870312 + ... + 5884950.

It is an arithmetic number, because the mean of its divisors is an integer number (3098995200).

Almost surely, 2^86042640209 is an apocalyptic number.

It is an amenable number.

86042640209 is a deficient number, since it is larger than the sum of its proper divisors (13125206191).

86042640209 is a wasteful number, since it uses less digits than its factorization.

86042640209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15293.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 86042640209 in words is "eighty-six billion, forty-two million, six hundred forty thousand, two hundred nine".