84565336409 has 4 divisors (see below), whose sum is σ = 84786134016. Its totient is φ = 84344538804.

The previous prime is 84565336393. The next prime is 84565336447. The reversal of 84565336409 is 90463356548.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84565336409 - 2⁴ = 84565336393 is a prime.

It is a super-2 number, since 2×84565336409² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84565335409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110398229 + ... + 110398994.

It is an arithmetic number, because the mean of its divisors is an integer number (21196533504).

Almost surely, 2^84565336409 is an apocalyptic number.

It is an amenable number.

84565336409 is a deficient number, since it is larger than the sum of its proper divisors (220797607).

84565336409 is a wasteful number, since it uses less digits than its factorization.

84565336409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220797606.

The product of its (nonzero) digits is 9331200, while the sum is 53.

The spelling of 84565336409 in words is "eighty-four billion, five hundred sixty-five million, three hundred thirty-six thousand, four hundred nine".