86611557 has 16 divisors (see below), whose sum is σ = 124528320. Its totient is φ = 53366400.

The previous prime is 86611541. The next prime is 86611559. The reversal of 86611557 is 75511668.

It is not a de Polignac number, because 86611557 - 2⁴ = 86611541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86611559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16194 + ... + 20867.

It is an arithmetic number, because the mean of its divisors is an integer number (7783020).

Almost surely, 2^86611557 is an apocalyptic number.

It is an amenable number.

86611557 is a deficient number, since it is larger than the sum of its proper divisors (37916763).

86611557 is a wasteful number, since it uses less digits than its factorization.

86611557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37124.

The product of its digits is 50400, while the sum is 39.

The square root of 86611557 is about 9306.5330279326. The cubic root of 86611557 is about 442.4443110358. Note that the first 3 decimals are identical.

The spelling of 86611557 in words is "eighty-six million, six hundred eleven thousand, five hundred fifty-seven".