86440940859 has 32 divisors (see below), whose sum is σ = 150196032000. Its totient is φ = 42913147392.

The previous prime is 86440940851. The next prime is 86440940867. The reversal of 86440940859 is 95804904468.

It is an interprime number because it is at equal distance from previous prime (86440940851) and next prime (86440940867).

It is not a de Polignac number, because 86440940859 - 2³ = 86440940851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86440940799 and 86440940808.

It is not an unprimeable number, because it can be changed into a prime (86440940851) 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 31 ways as a sum of consecutive naturals, for example, 9308109 + ... + 9317390.

It is an arithmetic number, because the mean of its divisors is an integer number (4693626000).

Almost surely, 2^86440940859 is an apocalyptic number.

86440940859 is a deficient number, since it is larger than the sum of its proper divisors (63755091141).

86440940859 is a wasteful number, since it uses less digits than its factorization.

86440940859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18625539.

The product of its (nonzero) digits is 9953280, while the sum is 57.

The spelling of 86440940859 in words is "eighty-six billion, four hundred forty million, nine hundred forty thousand, eight hundred fifty-nine".