84869555018 has 4 divisors (see below), whose sum is σ = 127304332530. Its totient is φ = 42434777508.

The previous prime is 84869554981. The next prime is 84869555063. The reversal of 84869555018 is 81055596848.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 60301186969 + 24568368049 = 245563^2 + 156743^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21217388753 + ... + 21217388756.

Almost surely, 2^84869555018 is an apocalyptic number.

84869555018 is a deficient number, since it is larger than the sum of its proper divisors (42434777512).

84869555018 is a wasteful number, since it uses less digits than its factorization.

84869555018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42434777511.

The product of its (nonzero) digits is 13824000, while the sum is 59.

The spelling of 84869555018 in words is "eighty-four billion, eight hundred sixty-nine million, five hundred fifty-five thousand, eighteen".