86043075561 has 9 divisors (see below), whose sum is σ = 124285713591. Its totient is φ = 57361463712.

The previous prime is 86043075553. The next prime is 86043075577. The reversal of 86043075561 is 16557034068.

The square root of 86043075561 is 293331.

It is a perfect power (a square), and thus also a powerful number.

86043075561 is a `hidden beast` number, since 8 + 60 + 4 + 30 + 7 + 556 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21701709225 + 64341366336 = 147315^2 + 253656^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 86043075561 - 2³ = 86043075553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86043075061) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 831105 + ... + 928881.

Almost surely, 2^86043075561 is an apocalyptic number.

86043075561 is the 293331-st square number.

86043075561 is the 146666-th centered octagonal number.

It is an amenable number.

86043075561 is a deficient number, since it is larger than the sum of its proper divisors (38242638030).

86043075561 is an frugal number, since it uses more digits than its factorization.

86043075561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195560 (or 97780 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 86043075561 in words is "eighty-six billion, forty-three million, seventy-five thousand, five hundred sixty-one".