86778449659 has 16 divisors (see below), whose sum is σ = 95235747840. Its totient is φ = 78417293760.

The previous prime is 86778449629. The next prime is 86778449663. The reversal of 86778449659 is 95694487768.

It is a cyclic number.

It is not a de Polignac number, because 86778449659 - 2⁷ = 86778449531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86778449591 and 86778449600.

It is not an unprimeable number, because it can be changed into a prime (86778449629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1200934 + ... + 1271140.

It is an arithmetic number, because the mean of its divisors is an integer number (5952234240).

Almost surely, 2^86778449659 is an apocalyptic number.

86778449659 is a deficient number, since it is larger than the sum of its proper divisors (8457298181).

86778449659 is a wasteful number, since it uses less digits than its factorization.

86778449659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70890.

The product of its digits is 731566080, while the sum is 73.

The spelling of 86778449659 in words is "eighty-six billion, seven hundred seventy-eight million, four hundred forty-nine thousand, six hundred fifty-nine".