87198220832 has 18 divisors (see below), whose sum is σ = 171674785989. Its totient is φ = 43598275200.

The previous prime is 87198220807. The next prime is 87198220927. The reversal of 87198220832 is 23802289178.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 74662283536 + 12535937296 = 273244^2 + 111964^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=208804.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1644332 + ... + 1696532.

Almost surely, 2^87198220832 is an apocalyptic number.

It is an amenable number.

87198220832 is a deficient number, since it is larger than the sum of its proper divisors (84476565157).

87198220832 is an frugal number, since it uses more digits than its factorization.

87198220832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104412 (or 52203 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 50.

Multiplying 87198220832 by its sum of digits (50), we get a square (4359911041600 = 2088040²).

The spelling of 87198220832 in words is "eighty-seven billion, one hundred ninety-eight million, two hundred twenty thousand, eight hundred thirty-two".