71684587806 has 32 divisors (see below), whose sum is σ = 154408087680. Its totient is φ = 22055294304.

The previous prime is 71684587789. The next prime is 71684587811. The reversal of 71684587806 is 60878548617.

It is a happy number.

It is a super-3 number, since 3×71684587806³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 71684587806.

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, 1816521 + ... + 1855563.

It is an arithmetic number, because the mean of its divisors is an integer number (4825252740).

Almost surely, 2^71684587806 is an apocalyptic number.

71684587806 is an abundant number, since it is smaller than the sum of its proper divisors (82723499874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71684587806 is a wasteful number, since it uses less digits than its factorization.

71684587806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62600.

The product of its (nonzero) digits is 18063360, while the sum is 60.

The spelling of 71684587806 in words is "seventy-one billion, six hundred eighty-four million, five hundred eighty-seven thousand, eight hundred six".