86853561 has 16 divisors (see below), whose sum is σ = 122814144. Its totient is φ = 54408704.

The previous prime is 86853551. The next prime is 86853581. The reversal of 86853561 is 16535868.

It is not a de Polignac number, because 86853561 - 2¹⁰ = 86852537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86853511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47710 + ... + 49496.

It is an arithmetic number, because the mean of its divisors is an integer number (7675884).

Almost surely, 2^86853561 is an apocalyptic number.

It is an amenable number.

86853561 is a deficient number, since it is larger than the sum of its proper divisors (35960583).

86853561 is a wasteful number, since it uses less digits than its factorization.

86853561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760.

The product of its digits is 172800, while the sum is 42.

The square root of 86853561 is about 9319.5257926570. The cubic root of 86853561 is about 442.8560102196.

It can be divided in two parts, 8685 and 3561, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 86853561 in words is "eighty-six million, eight hundred fifty-three thousand, five hundred sixty-one".