86206478621 has 16 divisors (see below), whose sum is σ = 88124502528. Its totient is φ = 84305774400.

The previous prime is 86206478573. The next prime is 86206478623. The reversal of 86206478621 is 12687460268.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 86206478621 - 2¹⁸ = 86206216477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86206478621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86206478623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11364596 + ... + 11372178.

It is an arithmetic number, because the mean of its divisors is an integer number (5507781408).

Almost surely, 2^86206478621 is an apocalyptic number.

It is an amenable number.

86206478621 is a deficient number, since it is larger than the sum of its proper divisors (1918023907).

86206478621 is a wasteful number, since it uses less digits than its factorization.

86206478621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8692.

The product of its (nonzero) digits is 1548288, while the sum is 50.

It can be divided in two parts, 8620647 and 8621, that added together give a palindrome (8629268).

The spelling of 86206478621 in words is "eighty-six billion, two hundred six million, four hundred seventy-eight thousand, six hundred twenty-one".