86320643508 has 108 divisors (see below), whose sum is σ = 240086726880. Its totient is φ = 26130756960.

The previous prime is 86320643503. The next prime is 86320643531. The reversal of 86320643508 is 80534602368.

It is a happy number.

86320643508 is a `hidden beast` number, since 8 + 6 + 3 + 206 + 435 + 0 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86320643501) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4429041 + ... + 4448487.

Almost surely, 2^86320643508 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86320643508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120043363440).

86320643508 is an abundant number, since it is smaller than the sum of its proper divisors (153766083372).

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

86320643508 is a wasteful number, since it uses less digits than its factorization.

86320643508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20498 (or 20482 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 86320643508 in words is "eighty-six billion, three hundred twenty million, six hundred forty-three thousand, five hundred eight".