86320643506 has 16 divisors (see below), whose sum is σ = 133953831000. Its totient is φ = 41669544448.

The previous prime is 86320643503. The next prime is 86320643531. The reversal of 86320643506 is 60534602368.

It can be written as a sum of positive squares in 4 ways, for example, as 56446632225 + 29874011281 = 237585^2 + 172841^2 .

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 7 ways as a sum of consecutive naturals, for example, 1262946 + ... + 1329538.

Almost surely, 2^86320643506 is an apocalyptic number.

86320643506 is a deficient number, since it is larger than the sum of its proper divisors (47633187494).

86320643506 is a wasteful number, since it uses less digits than its factorization.

86320643506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88973.

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 86320643506 in words is "eighty-six billion, three hundred twenty million, six hundred forty-three thousand, five hundred six".