86172019208 has 48 divisors (see below), whose sum is σ = 186943470000. Its totient is φ = 37107560160.

The previous prime is 86172019207. The next prime is 86172019223. The reversal of 86172019208 is 80291027168.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (86172019207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2324258 + ... + 2361041.

It is an arithmetic number, because the mean of its divisors is an integer number (3894655625).

Almost surely, 2^86172019208 is an apocalyptic number.

86172019208 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

86172019208 is an abundant number, since it is smaller than the sum of its proper divisors (100771450792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86172019208 is a wasteful number, since it uses less digits than its factorization.

86172019208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4685346 (or 4685331 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 44.

The spelling of 86172019208 in words is "eighty-six billion, one hundred seventy-two million, nineteen thousand, two hundred eight".