86199503721 has 16 divisors (see below), whose sum is σ = 115395164544. Its totient is φ = 57235186944.

The previous prime is 86199503717. The next prime is 86199503737. The reversal of 86199503721 is 12730599168.

It is not a de Polignac number, because 86199503721 - 2² = 86199503717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86199503021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4754145 + ... + 4772241.

It is an arithmetic number, because the mean of its divisors is an integer number (7212197784).

Almost surely, 2^86199503721 is an apocalyptic number.

It is an amenable number.

86199503721 is a deficient number, since it is larger than the sum of its proper divisors (29195660823).

86199503721 is a wasteful number, since it uses less digits than its factorization.

86199503721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24400.

The product of its (nonzero) digits is 816480, while the sum is 51.

The spelling of 86199503721 in words is "eighty-six billion, one hundred ninety-nine million, five hundred three thousand, seven hundred twenty-one".