86561995 has 16 divisors (see below), whose sum is σ = 116730432. Its totient is φ = 61142400.

The previous prime is 86561971. The next prime is 86561999. The reversal of 86561995 is 59916568.

It is a de Polignac number, because none of the positive numbers 2^k-86561995 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86561999) 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, 27456 + ... + 30445.

It is an arithmetic number, because the mean of its divisors is an integer number (7295652).

Almost surely, 2^86561995 is an apocalyptic number.

86561995 is a deficient number, since it is larger than the sum of its proper divisors (30168437).

86561995 is a wasteful number, since it uses less digits than its factorization.

86561995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57942.

The product of its digits is 583200, while the sum is 49.

The square root of 86561995 is about 9303.8698937593. The cubic root of 86561995 is about 442.3599011727.

The spelling of 86561995 in words is "eighty-six million, five hundred sixty-one thousand, nine hundred ninety-five".