87198220806 has 16 divisors (see below), whose sum is σ = 175359960048. Its totient is φ = 28905487200.

The previous prime is 87198220789. The next prime is 87198220807. The reversal of 87198220806 is 60802289178.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87198220807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40145425 + ... + 40147596.

It is an arithmetic number, because the mean of its divisors is an integer number (10959997503).

Almost surely, 2^87198220806 is an apocalyptic number.

87198220806 is an abundant number, since it is smaller than the sum of its proper divisors (88161739242).

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

87198220806 is a wasteful number, since it uses less digits than its factorization.

87198220806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80293207.

The product of its (nonzero) digits is 774144, while the sum is 51.

The spelling of 87198220806 in words is "eighty-seven billion, one hundred ninety-eight million, two hundred twenty thousand, eight hundred six".