86550561 has 6 divisors (see below), whose sum is σ = 125017490. Its totient is φ = 57700368.

The previous prime is 86550557. The next prime is 86550601. The reversal of 86550561 is 16505568.

It can be written as a sum of positive squares in only one way, i.e., 62726400 + 23824161 = 7920^2 + 4881^2 .

It is not a de Polignac number, because 86550561 - 2² = 86550557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86550551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4808356 + ... + 4808373.

Almost surely, 2^86550561 is an apocalyptic number.

It is an amenable number.

86550561 is a deficient number, since it is larger than the sum of its proper divisors (38466929).

86550561 is a wasteful number, since it uses less digits than its factorization.

86550561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9616735 (or 9616732 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 86550561 is about 9303.2553979776. The cubic root of 86550561 is about 442.3404231642.

The spelling of 86550561 in words is "eighty-six million, five hundred fifty thousand, five hundred sixty-one".