87219999880 has 32 divisors (see below), whose sum is σ = 211340770200. Its totient is φ = 32204307456.

The previous prime is 87219999869. The next prime is 87220000013. The reversal of 87219999880 is 8899991278.

It can be written as a sum of positive squares in 4 ways, for example, as 65150520516 + 22069479364 = 255246^2 + 148558^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83864865 + ... + 83865904.

Almost surely, 2^87219999880 is an apocalyptic number.

It is an amenable number.

87219999880 is an abundant number, since it is smaller than the sum of its proper divisors (124120770320).

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

87219999880 is a wasteful number, since it uses less digits than its factorization.

87219999880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167730793 (or 167730789 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 70.

The spelling of 87219999880 in words is "eighty-seven billion, two hundred nineteen million, nine hundred ninety-nine thousand, eight hundred eighty".