2018237898609 has 9 divisors (see below), whose sum is σ = 2915238676363. Its totient is φ = 1345489091112.

The previous prime is 2018237898587. The next prime is 2018237898623. The reversal of 2018237898609 is 9068987328102.

The square root of 2018237898609 is 1420647.

It is a perfect power (a square), and thus also a powerful number.

2018237898609 is a `hidden beast` number, since 2 + 0 + 18 + 2 + 3 + 7 + 8 + 9 + 8 + 609 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1619900199009 + 398337699600 = 1272753^2 + 631140^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 2018237898609 - 2⁵ = 2018237898577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2018237898109) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4025167 + ... + 4498715.

Almost surely, 2^{2018237898609} is an apocalyptic number.

2018237898609 is the 1420647-th square number.

2018237898609 is the 710324-th centered octagonal number.

It is an amenable number.

2018237898609 is a deficient number, since it is larger than the sum of its proper divisors (897000777754).

2018237898609 is an frugal number, since it uses more digits than its factorization.

2018237898609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947104 (or 473552 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 2018237898609 in words is "two trillion, eighteen billion, two hundred thirty-seven million, eight hundred ninety-eight thousand, six hundred nine".