87198888889178 has 16 divisors (see below), whose sum is σ = 143065579289760. Its totient is φ = 39531278480400.

The previous prime is 87198888889109. The next prime is 87198888889183.

87198888889178 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5228996753 + ... + 5229013428.

It is an arithmetic number, because the mean of its divisors is an integer number (8941598705610).

Almost surely, 2^{87198888889178} is an apocalyptic number.

87198888889178 is a deficient number, since it is larger than the sum of its proper divisors (55866690400582).

87198888889178 is a wasteful number, since it uses less digits than its factorization.

87198888889178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10458010573.

The product of its digits is 66588770304, while the sum is 98.

The spelling of 87198888889178 in words is "eighty-seven trillion, one hundred ninety-eight billion, eight hundred eighty-eight million, eight hundred eighty-nine thousand, one hundred seventy-eight".