1018854040689 has 27 divisors (see below), whose sum is σ = 1490892759993. Its totient is φ = 670480638984.

The previous prime is 1018854040643. The next prime is 1018854040717. The reversal of 1018854040689 is 9860404588101.

It is a happy number.

The square root of 1018854040689 is 1009383.

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

1018854040689 is a `hidden beast` number, since 1 + 0 + 18 + 8 + 540 + 4 + 0 + 6 + 89 = 666.

It is not a de Polignac number, because 1018854040689 - 2²⁷ = 1018719822961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1018854040639) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 239221642 + ... + 239225900.

Almost surely, 2^{1018854040689} is an apocalyptic number.

1018854040689 is the 1009383-rd square number.

1018854040689 is the 504692-nd centered octagonal number.

It is an amenable number.

1018854040689 is a deficient number, since it is larger than the sum of its proper divisors (472038719304).

1018854040689 is an frugal number, since it uses more digits than its factorization.

1018854040689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8682 (or 4341 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 54.

The spelling of 1018854040689 in words is "one trillion, eighteen billion, eight hundred fifty-four million, forty thousand, six hundred eighty-nine".