86218405646 has 32 divisors (see below), whose sum is σ = 131898611520. Its totient is φ = 42257376000.

The previous prime is 86218405579. The next prime is 86218405667. The reversal of 86218405646 is 64650481268.

It is a super-2 number, since 2×86218405646² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 86218405594 and 86218405603.

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, 78594170 + ... + 78595266.

It is an arithmetic number, because the mean of its divisors is an integer number (4121831610).

Almost surely, 2^86218405646 is an apocalyptic number.

86218405646 is a deficient number, since it is larger than the sum of its proper divisors (45680205874).

86218405646 is a wasteful number, since it uses less digits than its factorization.

86218405646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2780.

The product of its (nonzero) digits is 2211840, while the sum is 50.

The spelling of 86218405646 in words is "eighty-six billion, two hundred eighteen million, four hundred five thousand, six hundred forty-six".