86515216649 has 4 divisors (see below), whose sum is σ = 86521123536. Its totient is φ = 86509309764.

The previous prime is 86515216643. The next prime is 86515216673. The reversal of 86515216649 is 94661251568.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86515216649 - 2⁴ = 86515216633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86515216649.

It is not an unprimeable number, because it can be changed into a prime (86515216643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2931419 + ... + 2960784.

It is an arithmetic number, because the mean of its divisors is an integer number (21630280884).

Almost surely, 2^86515216649 is an apocalyptic number.

It is an amenable number.

86515216649 is a deficient number, since it is larger than the sum of its proper divisors (5906887).

86515216649 is a wasteful number, since it uses less digits than its factorization.

86515216649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5906886.

The product of its digits is 3110400, while the sum is 53.

The spelling of 86515216649 in words is "eighty-six billion, five hundred fifteen million, two hundred sixteen thousand, six hundred forty-nine".