86551621585 has 32 divisors (see below), whose sum is σ = 122073985152. Its totient is φ = 58078702080.

The previous prime is 86551621547. The next prime is 86551621589. The reversal of 86551621585 is 58512615568.

It is not a de Polignac number, because 86551621585 - 2¹⁵ = 86551588817 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86551621589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1652317 + ... + 1703893.

It is an arithmetic number, because the mean of its divisors is an integer number (3814812036).

Almost surely, 2^86551621585 is an apocalyptic number.

It is an amenable number.

86551621585 is a deficient number, since it is larger than the sum of its proper divisors (35522363567).

86551621585 is a wasteful number, since it uses less digits than its factorization.

86551621585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53953.

The product of its digits is 2880000, while the sum is 52.

The spelling of 86551621585 in words is "eighty-six billion, five hundred fifty-one million, six hundred twenty-one thousand, five hundred eighty-five".