84257588018 has 6 divisors (see below), whose sum is σ = 126386997789. Its totient is φ = 42128588756.

The previous prime is 84257587987. The next prime is 84257588027. The reversal of 84257588018 is 81088575248.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 74800609009 + 9456979009 = 273497^2 + 97247^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=205253.

It is a super-2 number, since 2×84257588018² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

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 2 ways as a sum of consecutive naturals, for example, 307880 + ... + 513132.

Almost surely, 2^84257588018 is an apocalyptic number.

84257588018 is a deficient number, since it is larger than the sum of its proper divisors (42129409771).

84257588018 is an frugal number, since it uses more digits than its factorization.

84257588018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410508 (or 205255 counting only the distinct ones).

The product of its (nonzero) digits is 5734400, while the sum is 56.

The spelling of 84257588018 in words is "eighty-four billion, two hundred fifty-seven million, five hundred eighty-eight thousand, eighteen".